Recombinant proteins derived from HGF and MSP

ABSTRACT

Recombinant proteins deriving from recombination of structural domains deriving from the α subunits of HGF and/or MSP growth factors. The recombinant proteins of the present invention have biological activity, and protect cells from death (apoptosis) induced by chemotherapeutic drugs. These molecules can conveninently be used to prevent or to treat the toxic side effects of chemotherapeutic agents used in cancer therapy.

This application is the national phase under 35 U.S.C. §371 of PCT International Application No. PCT/EP99/00478 which has an International filing date of Jan. 27, 1999, which designated the United States of America, and was published on Aug. 5, 1999 as International Publication No. WO 99/38967.

FIELD OF THE INVENTION

The present invention relates to recombinant proteins obtained from the combination of structural domains derived from the a subunits of hepatocyte growth factor (HGF) and macrophage stimulating protein (MSP).

In particular, the engineered factors of the invention are obtained by combination of the hairpin loop and kringle domains of the α chains of HGF and/or MSP, so as to obtain a structure having two superdomains with an intervening linker sequence. Moreover, the invention relates to DNA sequences encoding the above mentioned recombinant proteins, to the expression vectors comprising said DNA sequences and to host cells containing said expression vectors. The recombinant proteins of the present invention are biologically active, and their activity can be measured by determination of their ability to induce activation of the Met tyrosine kinase receptor, their “scattering” effect on epithelial cells, and their protective effect against cell death induced by chemotherapic drugs (vide infra). Therefore, these molecules can conveniently be used to prevent or treat the toxic side effects of the chemotherapeutical treatment of tumours, and to reduce iatrogenic cell damage induced by other types of drugs.

TECHNOLOGICAL BACKGROUND

Hepatocyte Growth Factor (HGF) and Macrophage Stimulating Protein (MSP) are highly related proteins both structurally and functionally (FIGS. 1 and 2). Both these factors are secreted as an inactive precursor, which is processed by specific proteases which recognise a cleavage site inside the molecule, dividing the protein in two subunits. These subunits, named α chain and β chain, are linked by a disulphide bond. Thus, the mature factor is an α-β dimeric protein. Only the mature (dimeric) form of the factor is able to activate its receptor at the surface of the target cells (the Met tyrosine kinase in the case of HGF and the Ron tyrosine kinase in the case of MSP) and therefore to mediate biological responses (Naldini, L. et al., 1992, EMBO J. 11: 4825-4833; Wang, M. et al., 1994, J. Biol. Chem. 269; 3436-3440; Bottaro, D. et al., 1991, Science 25: 802-804; Naldini, L. et al., 1991, EMBO J. 10: 2867-2878; Wang, M. et al., 1994, Science 266: 117-119; Gaudino, G. et al., 1994, EMBO J. 13: 3524-3532).

The α chain of both factors contains a hairpin loop (HL) structure and four domains with a tangle-like structure named kringles (K1-K4; Nakamura T et al., 1989, Nature 342:440-443; Han, S. et al., 1991, Biochemistry 30: 9768-9780). The precursor also contains a signal sequence (LS) of 31 amino acids (in the case of HGF) or of 18 amino acids (in the case of MSP), removed in rough endoplasmic reticulum, which directs the neoformed peptide to the secretive pathway. The β chain contains a box with a sequence homologous to that typical of serine proteases, but it has no catalytic activity (Nakamura T et al., 1989, Nature 342:440-443; Han, S. et al., 1991, Biochemistry 30: 9768-9780). Both α and β chains contribute to the binding of the growth factor to the respective receptor (Met for HGF and Ron for MSP).

HGF and MSP polypeptides are able to induce a variety of biological effects besides cell proliferation. The main biological activities of these molecules are: stimulation of cell division (mitogenesis); stimulation of motility (scattering); induction of polarisation and cell differentiation; induction of tubule formation (branched morphogenesis); increase of cell survival (protection from apoptosis). The tissues that respond to HGF and MSP stimulation are those where cells express the respective Met (HGF) and Ron (MSP) receptors. The most important target tissues of these factors are epithelial cells of different organs, such as liver, kidney, lung, breast, pancreas and stomach, and some cells of the hematopoietic and nervous systems. A detailed review of the biological effects of HGF and MSP in the various tissues can be found in Tamagnone, L. & Comoglio, P., 1997, Cytokine & Growth Factor Re-views, 8: 129-142, Elsevier Science Ltd.; Zarnegar, R. & Michalopoulos, G., 1995, J. Cell Biol. 129: 1177-1180; Medico, E. et al., 1996, Mol. Biol. Cell, 7: 495-504; Banu, N. et al., 1996, J. Immunol. 156: S2933-2940.

In the case of HGF, the hairpin loop and the first two kringles are known to contain the sites of direct interaction with the Met receptor (Lokker NA et al., 1992, EMBO J., 11:2503-2510; Lokker, N. et al., 1994, Protein Engineering 7: 895-903). Two naturally-occurring truncated forms of HGF produced by some cells by alternative splicing have been described. The first one comprises the first kringle (NKI-HGF Cioce, V. et al., 1996, J. Biol. Chem. 271: 13110-13115) whereas the second one spans to the second kringle (NK2-HGF Miyazawa, K. et al., 1991, Eur. J. Biochem. 197: 15-22). NK2-HGF induces cell scattering, but it is not mitogenic as the complete growth factor is (Hartmann, G. et al., 1992, Proc. Natl. Acad. Sci. USA 89: 11574-11578). However, NK2-HGF regains mitogenic activity in the presence of heparin, a glucosaminoglycan that binds HGF through a domain contained in the first kringle and which is likely to induce dimerization of NK2-HGF (Schwall, R. et al., 1996, J. Cell Biol. 133: 709-718). Moreover NK2-HGF, being a partial agonist of Met, behaves as a competitive inhibitor of HGF as far as the mitogenic activity is concerned (Chan, A. et al., 1991, Science 254: 1382-1385). NK1-HGF has also been described to exert partial stimulation of Met and competitive inhibition of HGF mitogenic activity (Cioce, V. et al., 1996, J. Biol. Chem. 27: 13110-13115). Anyway, a truncated factor is endowed with an activity markedly lower than the recombinant factors described in the invention, as shown in example 3.

In the case of MSP, the interaction sites with the Ron receptor are less understood: some preliminary studies suggest a situation opposite of that of HGF, i.e. the β chain directly binds the receptor whereas the α chain would act stabilizing the complex (Wang MH et al., 1997, J. Biol. Chem. 272:16999-17004).

The therapeutical use of molecules such as HGF and MSP is potentially valuable in a wide range of pathologies (Abdulla, S., 1997, Mol. Med. Today 3: 233). Nevertheless, a number of technical as well as biological complications make the application of these molecules in clinics difficult. First of all, the pleiotropic character of these factors can causes poorly selective biological responses, which involve undesired side effects. For example, the use of HGF to prevent some side effects of the chemotherapeutic drug cisplatin has been proposed (Kawaida K et al., 1994, Proc. Natl. Acad. Sci. 91:4357-4361). Cancer patients treated with this drug can suffer kidney acute damage due to the cytotoxic action of cisplatin on proximal tubule epithelial cells. HGF is able to protect these cells against programmed death (apoptosis) induced by cisplatin, but at the same time it can induce an undesired proliferation of neoplastic cells. Other problems related to the pharmaceutical use of HGF and MSP are the necessity of their proteolytic activation and their stability, which causes technical problems. The NK1 and NK2 truncated forms of HGF do not require proteolytic activation, but they have a reduced biological activity.

SUMMARY OF THE INVENTION

The present invention provides recombinant molecules composed of a combination of structural domains derived from the α chains of HGF and/or MSP, which overcome the problems of the prior art molecules described above. The molecules of this invention are composed of two superdomains connected by a linker. Each superdomain is composed of a combination of the HL and K1-K4 domains of the α chain of HGF and/or MSP. These engineered factors induce selective biological responses, do not require proteolytic activation, are stable and are more active than the truncated forms of HGF described previously.

DETAILED DISCLOSURE OF THE INVENTION

The present invention relates to recombinant proteins (which will be hereinafter referred to indifferently as proteins, molecules, engineered or recombinant factors) characterised by a structure that comprises two superdomains, each consisting of a combination of HL and K1-K4 domains derived from the α chain of HGF and/or MSP, linked by a spacer sequence or a linker. In particular, the invention relates to proteins of general formula (I)

[A]−B−[C]−(D)_(y)  (I)

in which

[A] corresponds to the sequence (LS)_(m)-HL-K1-(K2)_(n)-(K3)_(o)-(K4)_(p) wherein (the numbering of the following amino acids refers to the HGF and MSP sequences as reported in FIGS. 1 and 2, respectively):

LS is an amino acid sequence corresponding to residues 1-31 of HGF or 1-18 of MSP;

HL is an amino acid sequence derived from the α chain of HGF starting between residues 32-70 and ending between residues 96-127; or it is an amino acid sequence derived from the α chain of MSP starting between residues 19-56 and ending between residues 78-109;

K1 is an amino acid sequence derived from the α chain of HGF starting between residues 97-128 and ending between residues 201-205; or it is an amino acid sequence derived from the α chain of MSP starting between residues 79-110 and ending between residues 186-190;

K2 is an amino acid sequence derived from the α chain of HGF starting between residues 202-206 and ending between residues 283-299; or it is an amino acid sequence derived from the α chain of MSP starting between residues 187-191 and ending between residues 268-282;

K3 is an amino acid sequence derived from the α chain of HGF starting between residues 284-300 and ending between residues 378-385; or it is an amino acid sequence derived from the α chain of MSP starting between residues 269-283 and ending between residues 361-369;

K4 is an amino acid sequence derived from the α chain of HGF starting between residues 379-386 and ending between residues 464-487; or it is an amino acid sequence derived from the α chain of MSP starting between residues 362-370 and ending between residues 448-481;

m, n, o, p can be 0 or 1;

the sum n+o+p is an integer from 1 to 3 or 0, with the proviso that n≧o≧p;

B is the sequence [(X)_(q)Y]_(r), wherein X=Gly and Y=Ser, or Cys, or Met, or Ala;

q is an integer from 2 to 8;

r is an integer from 1 to 9;

[C] corresponds to the sequence HL-K1-(K2)_(s)-(K3)_(t)-(K4)_(u) wherein HL, K1-K4 are as defined above,

s, t, u are 0 or 1; the sum s+t+u is an integer from 1 to 3 or 0, with the proviso that s≧t≧u;

D is the sequence W-Z, wherein W is a conventional proteolytic site, Z is any tag sequence useful for the purification and detection of the protein; y is 0 or 1.

Non-limiting examples of W are consensus sequences for enterokinase protease, thrombin, factor Xa and IgA protease.

Preferred proteins of general formula (I), are those in which: the HL domain is a sequence of HGF α chain ranging from amino acids 32 to 127, or a sequence of MPS α chain ranging from amino acids 19 to 98; the K1 domain is a sequence of HGF α chain ranging from amino acids 128 to 203, or a sequence of MPS α chain ranging from amino acids 99 to 188; the K2 domain is a sequence of HGF α chain ranging from amino acids 204 to 294, or a sequence of MPS α chain ranging from amino acids 189 to 274; the K3 domain is a sequence of HGF α chain ranging from amino acids 286 to 383, or a sequence of MPS α chain ranging from amino acids 275 and 367; the K4 domain is a sequence of HGF α chain ranging from amino acids 384 to 487, or a sequence of MPS α chain ranging from amino acids 368 and 477.

Among the possible combinations of the domains of general formula (I), the following (II) and (III) are preferred, concerning two recombinant factors named Metron Factor-1 and Magic Factor-1, respectively:

LS_(MSP)-HL_(MSP)-K1_(MSP)-K2_(MSP)

-L-HL_(HGF)-K1_(HGF)-K2_(HGF)-D

(Metron Factor-1)  (II)

and

LS_(HGF)-HL_(HGF)-K1_(HGF)-K2_(HGP)

-L-HL_(HGF)-K1_(HGF)-K2_(HGF)-D

(Magic Factor-1)  (III)

For both molecules, L is a linker sequence (Gly₄Ser)₃, D is a tag sequence Asp₄-Lys-His₆.

For Metron Factor-1, LS_(MSP) is the sequence 1-18 of MSP, HL_(MSP) is the sequence 19-56 of MSP, K1_(MSP) is the sequence 99-188 of MSP, K2_(MSP) is the sequence 189-274 of MSP, HL_(HGF) is the sequence 32-127 of HGF, K1_(HGF) is the sequence 128-203 of HGF, K2_(HGF) is the sequence 204-294 of HGF.

For Magic Factor-1, HL_(HGF), K1_(HGF), K2_(HGF) are as defined above, LS_(HGF) is the sequence 1-31 of HGF.

The hybrid molecules of the invention are prepared by genetic engineering techniques according to a strategy involving the following steps:

a) construction of DNA encoding the desired protein;

b) insertion of DNA in an expression vector;

c) transformation of a host cell with recombinant DNA (rDNA);

d) culture of the transformed host cell so as to express the recombinant protein;

e) extraction and purification of the produced recombinant protein.

The DNA sequences corresponding to HGF or MSP structural domains can be obtained by synthesis or starting from DNA encoding for the two natural factors. For example, screening of cDNA libraries can be carried out using suitable probes, so as to isolate HGF or MSP cDNA. Alternatively, HGF or MSP cDNA can be obtained by reverse transcription from purified mRNA from suitable cells.

cDNAs coding for the fragments of HGF and MSP β chains can be amplificated by PCR (Mullis, K. B. and Faloona, F. A., 1987, Methods in Enzymol. 155, 335-350), and the amplification products can be recombined making use of suitable restriction sites, naturally occurring in the factor sequences or artificially introduced in the oligonucleotide sequence used for the amplification.

In greater detail, one of the above mentioned strategies can be the following:

the portions of DNA encoding the LS, HL, K1, K2, K3 and K4 domains are amplificated by PCR from HGF or MSP cDNA and then recombined to obtain the hybrid sequences corresponding to [A] and [C]. Oligonucleotides recognising sequences located at the two ends of the domains to be amplificated are used as primers. Primers are designed so as to contain a sequence allowing recombination between the DNA of a domain and the adjacent one. Said recombination can be carried out by endonuclease cleavage and subsequent ligase reaction, or making use of the recombinant PCR method (Innis, N A et al., 1990, in PCR Protocols, Academic Press, 177-183).

The sequence encoding the domain B (linker) can be obtained by synthesis of a double chain oligonucleotide, which can be inserted between [A] and [C] using suitable restriction sites.

The resulting three fragments encoding for [A], [B] and [C] are then inserted in the correct sequence in a suitable vector. In this step it can be decided whether to add or not the domain D (tag), obtained by synthesis analogously to domain B, downstream fragment [C].

The recombinant expression vector can contain, in addition to the recombinant construct, a promoter, a ribosome binding site, an initiation codon, a stop codon, optionally a consensus site for expression enhancers.

The vector can also comprise a selection marker for isolating the host cells containing the DNA construct. Yeast or bacteria plasmids, such as plasmids suitable for Escherichia Coli, can be used as vectors, as well as bacteriophages, viruses, retroviruses, or DNA.

The vectors are cloned preferably in bacterial cells, for example in Escherichia Coli, as described in Sambrook J., 1989, Molecular Cloning, Cold Spring Harbor Laboratory Press, New York, and the colonies can be selected, for example, by hybridisation with radiolabelled oligonucleotide probes; subsequently, the rDNA sequence extracted from the positive colonies is determined by known methods.

The vector with the recombinant construct can be introduced in the host cell according to the competent cell method, the protoplast method, the calcium phosphate method, the DEAE-dextran method, the electric impulses method, the in vitro packaging method, the viral vector method, the micro-injection method, or other suitable techniques.

Host cells can be prokaryotic or eukaryotic, such as bacteria, yeasts or mammal cells, and they will be such as to effectively produce the recombinant protein.

After transformation, cells are grown in a suitable medium, which can be for example MEM, DMEM or RPMI 1640 in the case of mammal host cells.

The recombinant protein is secreted in the culture medium from which it can be recovered and purified with different methods, such as mass exclusion, absorption, affinity chromatography, salting-out, precipitation, dialysis, ultrafiltration.

A simple, rapid system for the production of the molecules of the invention is, for example, transient-expression in mammal cells.

Accordingly, the plasmid containing the recombinant DNA fragment, for example PMT2 (Sambrook, J. et al., 1989, Molecular Cloning, Cold Spring Harbor Laboratory Press), is transfected in suitable recipient cells, such as Cos7 (Sambrook, J. et al., supra) by the calcium phosphate technique or other equivalent techniques. Some days after transfection, the conditioned medium of the transfected cells is collected, cleared by centrifugation and analysed for its content in factor. For this analysis, antibodies directed against HGF or MSP, or against any tag sequence, can be used: the supernatant is immunoprecipitated and then analysed by western blot with the same antibody. The supernatant containing the recombinant factor can also be used directly for biochemical and biological tests. The protein can be purified, for example, using a poly-histidine tag sequence, by absorption on a nickel resin column and subsequent elution with imidazole.

The biochemical properties. of the recombinant factors of the invention were tested in connection with their ability to activate Met and Ron receptors.

Sub-micromolar concentrations of the factors have proved to induce phosphorylation in Met tyrosine in human epithelial cells A549, whereas they do not induce phosphorylation above basal values in cells expressing Ron. On the whole, the tests proved that the first two kringles of HGF maintain their ability to interact and to activate Met tyrosine kinase receptor, whereas the corresponding first two kringles of MSP are not sufficient for modulating the catalytic activity of the Ron receptor. However, the interaction with Ron, although at low affinity, can contribute to the recruitment of the factor at the cell surface, playing a similar role to low affinity receptors (of mature glycoprotein) which recruit the HGF intact molecule through the heparin-binding domain.

The molecules of the invention have a marked biological activity, measured by the scattering tests, and a protecting activity against cell apoptosis induced by cisplatin or etoposide.

In particular, the supernatant containing the recombinant factor has been found to promote scattering of epithelial cells of various nature even at nanomolar concentrations. In these tests, kidney epithelial cells (MDCK) or hepatocyte precursors (MLP29) were used.

In an in vitro experimental system, in which DNA fragmentation typical of apoptotic cells is evaluated by the TUNEL method (Gavrieli, Y. et al., 1992, J. Cell. Biol. 117, 493-501), the recombinant factors protect against apoptosis induced by chemotherapeutic drugs at levels comparable with HGF and remarkably higher than MSP. The engineered molecules proved to be active on human primary epithelial cells from proximal tubule (PTECs), on an immortalised PTECs line (Loc) and on the already cited murine hepatocytes MLP29.

Among the applications of the recombinant molecules of the invention, the following can be cited:

prevention of myelotoxicity; in particular they can be used for the expansion of marrow precursors, to increase proliferation of the hematopoietic precursors or to stimulate their entry in circle;

prevention of liver and kidney toxicity, and of mucositis following antineoplastic treatments; in particular the recombinant factors can be used to prevent toxicity (apoptosis) on differentiated cell elements of liver, kidney and mucosa of the gastroenteral tract, and to stimulate staminal elements of cutis and mucosas to allow the regeneration of germinative layers;

prevention of chemotherapeutic neurotoxicity.

In general, the proteins of the invention provide the following advantages, compared with the parent molecules HGF and MSP: they are smaller molecules with a more compact structure;

they are more stable and are produced in higher amounts;

they require no endoproteolytic cleavage for activation, which transforms the HGF and MSP precursors into the respective active forms;

they can be engineered in combinations of different functional domains, thereby modulating the biological effects, increasing the favourable ones and reducing those undesired (for example, protection from apoptosis versus cell proliferation).

The invention has to be considered also directed at amino acid and nucleotide sequences referred to formula (I), having modifications which can, for example, derive from degeneration of genetic code, without therefore modifying the amino acid sequence, or from the deletion, substitution, insertion, inversion or addition of nucleotides and/or bases according to all the possible methods known in the art.

Furthermore, the invention relates to the expression vectors comprising a sequence encoding for a protein of general formula (I), which can be plasmids, bacteriophages, vituses, retroviruses, or others, and to host cells containing said expression vectors,

Finally, the invention relates to the use of the recombinant proteins as therapeutical agents, and to pharmaceutical compositions containing an effective amount of the recombinant proteins together with pharmacologically acceptable excipients.

DESCRIPTION OF THE FIGURES

(In the following legends, -His located after the name of the parent factors, truncated or recombinant, or of the plasmids, means that the respective sequences contain a poly-histidine tag).

FIG. 1:

a) Nucleotide (SEQ ID NO: 17) and amino acid (SEQ ID NO: 18) sequence of human HGF (Gene Bank # M73239; Weidner, K. M., et al., 1991, Proc. Acad. Sci. USA, 88:7001-7005). In contrast to the cited reference, in the numbering used herein, nucleotide No. 1 is the first base of the initiation codon (the A of the first ATG). The first amino acid is the corresponding methionine. The cDNA untranslated regions at 5′ and 3′ are neither represented nor considered in the numbering.

b) Nucleotide (SEQ ID NO: 19) and amino acid (SEQ ID NO: 20) sequence of human MSP (Gene Bank # L11924; Yoshimura, T., et al., 1993, J. Biol. Chem., 268:15461-15468). In contrast to the cited reference, in the numbering used herein nucleotide No. 1 is the first base of the initiation codon (the A of the first ATG). The first amino acid is the corresponding methionine. The cDNA untranslated regions at 5′ and 3′ are neither represented nor considered in the numbering.

FIG. 2:

a) Molecular structure of Metron Factor-1. The leader sequence is removed from the cells used for the production before secretion and is therefore absent in the mature molecule. The poly-histidine tag can be removed by digestion with the protease enterokinase.

b) Nucleotide (SEQ ID NO: 21) and amino acid (SEQ ID NO: 4) sequence of Metron-Factor-1. The nucleotide sequence starts with the EcoRI site and terminates with the SalI site (first six bases and last six bases, respectively). The initiation codon (ATG) and the stop codon (TAG) are underlined.

FIG. 3:

a) Molecular structure of Magic Factor-1. The leader sequence is removed from the cells used for the production before secretion and is therefore absent in the mature molecule. Poly-histidine tag can be removed by digestion with the protease enterokinase.

b) Nucleotide (SEQ ID NO: 22) and amino acid (SEQ ID NO: 2) sequence of Magic Factor-1. The nucleotide sequence starts with the SalI site (first six bases and last six bases, respectively). The initiation codon (ATG) and the stop codon (TAG) are underlined.

FIG. 4:

Production of Metron-F-1 by transient transfection of mammal cells. The conditioned supernatants from BOSC cells transfected with the control plasmid (CTRL) or with pRK7-Metron F-1-His were immunoprecipitated with an anti-MSP polyclonal antibody and detected by western blot with the same antibody.

FIG. 5:

Quantitation of the recombinant proteins by western blot. (A) The proteins were absorbed on Sepharose-A-heparin beads and detected with an anti-poly-histidine monoclonal antibody. (B) The proteins were immunoprecipitated with an anti-MSP polygonal antibody and detected with an anti-poly-histidine monoclonal antibody.

FIG. 6:

Scattering test carried out on kidney epithelial cells (MDCK) using the recombinant proteins prepared by transient transfection. The protein content was quantified by western blot (see FIG. 5). (A) non-stimulated cells; (B) cells stimulated with control supernatant; (C) cells stimulated with HGF-His; (D) cells stimulated with NK2-HGF-His; (E) cells stimulated with Metron Factor-1; (F) cells stimulated with Magic Factor-1.

FIG. 7:

Activation (phosphorylation) of Met receptor by the hybrid factor Metron Factor-1. Human epithelial cells (A549) were stimulated with supernatants conditioned from BOSC cells transfected with the control plasmid (CTRL) or with pRK7-Metron-F-1-His (METRON F-1) at the indicated dilutions. Cell lysates from the stimulated cells were immunoprecipitated with an anti-Met monoclonal antibody and detected by western blot with an anti-phosphotyrosine monoclonal antibody.

FIG. 8:

Protective effect of Metron-F-1 against acute renal failure induced by HgCl₂ in vivo. Balb-c mice were injected i.v. with Metron-F-1 or vehicle at 0.5 h before and 6, 12, 24, 36 and 48 h after HgCl₂ i.v. administration. BUN and histological evaluation of renal necrosis were measured at 72 h.

Data expressed as mean+e.s. of 7 animals/group (BUN) or 3 animals/group (histology).

The following examples illustrate in greater detail the invention.

EXAMPLE 1a Preparation of the Recombinant Construct Encoding Metron Factor-1

HGF cDNA was obtained by the RT-PCR technique (Reverse Transcriptase PCR; in: Innis, M. A., et al., 1990, PCR Protocols, Academic Press, 21-27) from a human lung fibroblast cell line (MRC5; Naldini, L. et al., 1991, EMBO J. 10: 2867-2878). MSP cDNA was obtained with the same technique from human liver (Gaudino, G., et al., 1994, EMBO J. 13: 3524-3532).

The fragment corresponding to MSP LS-HL-K1-K2 was amplified by PCR using MSP cDNA as template and the following oligonucleotides as primers:

P1 (sense) (SEQ ID NO: 5)

5′ CGCGCGGAATTCCACCATGGGGTGGCTCCCACTCCT 3′

P2 (antisense) (SEQ ID NO: 6)

5′ CGCGCGCTCGAGGCGGGGCTGTGCCTCGGACCCGCA 3′

in which the underlined palindromic sequences are the restriction sites for the enzymes EcoRI (oligonucleotide P1) and XhoI (oligonucleotide P2). The PCR product was digested with the restriction enzymes EcoRI and XhoI and then purified by electrophoresis on agarose gel.

The fragment corresponding to HL-K1-K2 of HGF was amplified by PCR using HGF cDNA as template and the following oligonucleotides as primers:

P3 (sense) (SEQ ID NO: 7)

5′ CGCGCGTCTAGAGGGACAAAGGAAAAGAAGAAATAC 3′

P4 (antisense) (SEQ ID NO: 8)

5′ CGCGCGAAGCTTTGTCAGCGCATGTTTTAATTGCAC 3′

in which the underlined palindromic sequences are the restriction sites for the enzymes XbaI (oligonucleotide P3) and HindIII (oligonucleotide P4). The PCR product was digested with the restriction enzymes XbaI and HindIII and then purified by electrophoresis on agarose gel.

For the linker sequence, the following partially complementary oligonucleotides were synthesised, and were subsequently annealed to obtain a double strand DNA fragment with sticky ends:

P5 (sense) (SEQ ID NO: 9)

5′ TCGAGGGCGGTGGCGGTTCTGGTGGCGGTGGCTCCGGCGGTGGCGGTTCT 3′

P6 (antisense) (SEQ ID NO: 10)

5′ CTAGAGAACCGCCACCGCCGGAGCCACCGCCACCAGAACCGCCACCGCCC 3′

in which the underlined bases are the sequences compatible with the restriction sites for the enzymes XhoI (oligonucleotide P5) and XbaI (oligonucleotide P6).

The resulting three DNA fragments were subcloned in the EcoRI-HindIII sites of the expression vector pRK7 (Gaudino, G., et al., 1994, EMBO J. 13: 3524-3532), to obtain the recombinant plasmid pRK7-Metron-F-1, containing all the components of Metron Factor-1 except the tag sequence.

For the insertion of the tag sequence, the following partially complementary oligonucleotides were synthesised, and were subsequently annealed to obtain a double strand DNA fragment with sticky ends:

P7 (sense) (SEQ ID NO: 11)

5′ AGCTGACGACGACGACCACCACCACCACCACCACCACTAGGGTCGAC 3′

P8 (antisense) (SEQ ID NO: 12)

5′ AGCTGTCGACCCTAGTGGTGGTGGTGGTGGTGGTGTTTGTCGTCGTCGTC 3′

in which the underlined bases are compatible with the HindIII restriction site and the boxed palindromic sequences are the consensus sequences for the enzyme SalI. The resulting double strand DNA fragment was inserted in the restriction site HindIII of the recombinant plasmid obtained at the previous step (destroying the HindIII site and creating the SalI site), to obtain the plasmid pRK7-Metron-F-1-His.

EXAMPLE 1b Production of Metron Factor-1

The expression vector pRK7 contains a promoter of human cytomegalovirus immediate-early gene (CMV) and an episomal replication origin site of the DNA virus SV40. Therefore, this plasmid is particularly suitable for the expression of proteins in cells expressing the large T antigen of the virus SV40, such as kidney epithelial BOSC cells (Sambrook, J. et al., 1989, Molecular Cloning, Cold Spring Harbor Laboratory Press). Metron Factor-1 can then be produced by transient transfection of plasmid pRK7-Metron F-1-His in BOSC cells.

For transfection, 10⁶ cells are seeded at day 0 in a 100 mm plate in 90% Dulbecco's Modified Eagle Medium (DMEM)-10% bovine calf serum (10 ml/plate). At day 1, cells are transfected with 10 μg/plate of pRK7-Metron-F-1-His by lipofection, using the protocol provided by the lipofectin producer (Gibco-BRL). At day 2, the DNA-containing medium is substituted by fresh medium with low content in serum (99.5% DMEM-0.5% bovine calf serum). At day 4 (48 hours after the end of the transfection), the medium is collected, cleared by centrifugation, and analysed for its content in Metron Factor-1.

This analysis can be carried out in different ways. For example, the recombinant protein present in the cleared supernatant can be immunoprecipitated with an anti-MSP antibody and then detected by western blot with the same antibody (FIG. 4). In the example shown in FIG. 4, 500 μl of supernatant (cleared by centrifugation, buffered in 25 mM HEPES and added with a protease inhibitors cocktail) were immunoprecipitated (2 hours at 4° C.) with 20 μl of Sepharose-A beads (Pharmacia) covalently conjugated with 2 μl of anti-MSP polyclonal antibody. The beads pellet was washed 3 times with 500 μl of washing buffer (20 mM HEPES pH 7.4; 150 mM NaCl; 0.1% Triton X-100; 10% glycerol) and heated at 90° C. for 2 minutes in 100 ul of Laemmli buffer. Eluted proteins were separated by SDS-PAGE on 8% BIS-acrylamide gel, transferred onto membrane (Hybond-C; Amersham) and analysed by western blot. For this analysis, the same rabbit serum used for immunoprecipitation was employed as primary antibody with a 1:1000 dilution and protein A conjugated with peroxidase (Amersham) was used as secondary antibody. Protein A was detected by ECL (Amersham) following the protocol provided by the producer.

Alternatively, the recombinant protein can be partially purified by adsorption on Sepharose-A beads conjugated with heparin and subsequent analysis by western blot using antibodies directed to poly-histidine tag (FIG. 5).

In the example shown in FIG. 5, the Sepharose-A-heparin beads (20 μl; Pierce) were incubated (4 hours at 4° C.) with 500 μl of supernatant (cleared by centrifugation, buffered in 25 mM HEPES and added with a protease inhibitors cocktail) in the presence of 500 mM NaCl, washed with suitable buffer (500 mM NaCl; 20 mM HEPES pH 7.4; 0.1% Triton X-100; 10% glycerol) and heated at 90° C. for 2 minutes in 100 μl Laemmli buffer. Eluted proteins were separated by SDS-PAGE on 8% bis-acrylamide gel, transferred onto membrane (Hybond-C; Amersham) and analysed by western blot. For this analysis, a mouse monoclonal antibody to poly-histidine (Invitrogen) diluted 1:5000 was used as primary antibody and an anti-mouse IgG ovine antibody conjugated with peroxidase (Amersham) was used as secondary antibody. The secondary antibody was detected by ECL (Amersham) following the protocol provided by the producer.

The procedure of adsorption on heparin beads can also be used as protocol for the semi-purification of the recombinant protein. Furthermore, the molecule can additionally be purified making use of the poly-histidine affinity to heavy metals such as nickel. The protein containing poly-histidine tag can be adsorbed on a nickel resin column (invitrogen) and subsequently eluted with imidazole (the detailed protocol is provided by the manufacturer).

EXAMPLE 1c METRON-F-1 Production in Insect Cells

The cDNA encoding for Metron-F1 was subcloned in a suitable expression vector (p-FASTBAC) to generate a recombinant plasmid containing the Metron-F1 gene (p-FASTBAC-Metron). A competent E. Coli strain (DH10 Bac) was transformed with p-FASTBAC-Metron to generate BACMID DNA. The DNA of positive colonies was isolated and checked by PCR to show the correct integration of the expression vector. Subsequently, the DNA from three clones was transfected into Sf9 insect cells with CellFECTIN reagent to produce virus particles. Virus titer was tested by a plaque assay. Single plaques were isolated and used for further propagation of the baculovirus. Viral stock was subsequently expanded in insect cells to scale up METRON-F-1 production. To verify protein expression, insect cells were infected with a multiplicity of infection (MOI) of 1 in a small-scale reactor. Samples of supernatants were analysed by SDS-PAGE followed by western blotting.

To produce amounts adequate for in vivo testing, insect cells were propagated in a 2.5-Liter stirred tank bioreactor. Cells were grown to a cell density of 1.106 ml⁻¹ before they were infected with a MOI of 1. Cell suspension was harvested 3 days post infection. The supernatant containing the recombinant protein was separated by centrifugation. The presence of Metron F-1 in the supernatant was proved by SDS-PAGE followed by western blotting. Metron F-1 was pre-purified by a dual step affinity chromatography on heparin sepharose (heparin-Hi Trap, Pharmacia) at 6° C. For in vivo testing or for further purification steps, the eluted fractions containing Metron F-1 were desalted by Sephadex G-25 chromatography (PD-10 or HiPrep 26/10, Pharmacia). Metron F-1 was further purified by chromatography on HisTrap columns (Pharmacia) and eluted by an imidazole gradient (0-0.5 M) using either a low-pressure system (Econo System, BIO-RAD) or an FPLC system (Pharmacia). Metron F-1 was eluted at an imidazole concentration of about 0.15 M. For in vivo testing, the eluted fractions containing Metron F-1 were freed of imidazole by Sephadex G-25 chromatography as already described, using the buffer to be used for animal treatment.

EXAMPLE 2a Preparation of the Recombinant Construct Encoding for Magic Factor-1

HGF cDNA and the plasmid pRK7-Metron-F-1-His described above were used as starting DNA. The fragment corresponding to LS-HL-K1-K2 of HGF was amplificated by PCR using HGF cDNA as template and the following oligonucleotides as primers:

P9 (sense) (SEQ ID NO: 13)

5′ CGCGCGGGATCCGCCAGCCCGTCCAGCAGCACCATG 3′

P10 (antisense) (SEQ ID NO: 14)

5′ CGCGCGAAGCTTTGTCAGCGCATGTTTTAATTGCAC 3′

in which the underlined palindromic sequences are the restriction sites for the enzymes BamHI (oligonucleotide P9) and HindIII (oligonucleotide P10). The PCR product was digested with the restriction enzymes BamHI and HindIII and then purified by electrophoresis on agarose gel.

For the linker, the following partially complementary oligonucleotides were synthesized, and subsequently annealed to obtain a double strand DNA fragment with sticky ends:

P11 (sense) (SEQ ID NO: 15)

5′ AGCTTCGGGCGGTGGCGGTTCTGGTGGCGGTGGCTCCGGCGGTGGCGGTTCT 3′

P12 (antisense) (SEQ ID NO: 16)

5′ CTAGAGAACCGCCACCGCCGGAGCCACCGCCACCACAACCGCCACCGCCCGA 3′

in which the underlined bases are the sequences compatible with the restriction sites for the enzymes HindIII (oligonucleotide P11) and XbaI (oligonucleotide P12). The fragment resulting by PCR and the double strand linker sequence were inserted in the plasmid pRK7-Metron-F-1-His in place of the fragment EcoRI-XbaI by means of an EcoRI-BamHI adapter, to obtain the plasmid pRK7-Magic-F-1-His.

EXAMPLE 2b Production of Magic Factor-1

Magic Factor-1 is produced on a small scale by transient transfection of BOSC cells analogously to what described for Metron Factor-1. Semi-purification is performed by adsorption on Sepharose-A beads conjugated with heparin followed by Western blot analysis using anti-poly-histidine antibodies (FIG. 5).

EXAMPLE 3 Biological Activity (Scattering) on Epithelial Cells

The biological activity of recombinant HGF, NK2-HGF, Metron Factor-1 and Magic Factor-1 was tested by a “scatter” assay on MDCK epithelial cells. For this functional test, cells are plated at day 0 in 96-well plates (10³ cells/well) in 90% DMEM—10% bovine calf serum. At day 1 the medium is substituted with fresh medium buffered with 50 mM HEPES pH 7.4 and the supernatant containing the recombinant protein is added at different dilutions. At day 2 cells are washed with DPBS (Dulbecco's Phosphate Buffered Saline), fixed in 11% glutaraldehyde, stained with a Crystal-Violet solution and analysed by microscopy. The scattering activity is evaluated observing the morphology of the colonies, which are clustered in the negative control (non-stimulated cells or stimulated with supernatant containing no factors) whereas they are dispersed in the positive control (HGF-His). The morphology of the cells themselves also varies upon stimulation: in fact, as it can be observed in FIG. 6, cells stimulated with HGF-His and Metron Factor-1 have a more oblong, spindle-shaped form, characterised by protrusions of the cell membrane called pseudopodes. These morphological variations are the consequence of factor-induced activation of a genetic program involving the modification of a series of cellular parameters, such as digestion of cell matrix by specific proteases and increase in motility.

The Table summarises the results of different tests, obtained with factors HGF, NK2-HGF, Metron Factor-1 and Magic Factor-1 on MDCK cells. The scattering units reported indicate the maximum dilution of the conditioned supernatant containing the factor, at which motogenic activity could be observed. Values are normalised for the protein content determined by western blotting as described above (see FIG. 5). These data indicate that the hybrid factors Metron Factor-1 and Magic Factor-1 have a scattering activity approximately three magnitudes higher than that of the NK2-HGF-His truncated form and one magnitude higher than that of HGF-His parental factor.

HGF-his NK2-his Metron F-1 Magic Factor-1 Scatter units 900 ± 29 6 ± 5 5500 ± 1532 7600 ± 150

Table. Scattering activity of factors HGF-His, NK2-HGF-His Metron Factor-1 measured on kidney epithelial cells (MDCK). The scattering units reported indicate the maximum dilution of the conditioned supernatant containing the factor, at which a motogenic activity can be observed. Values are normalised for the protein content determined by western blotting.

EXAMPLE 4a Test for the Evaluation of Protection Against Programmed Cell Death (Apoptosis)

One of the most characterised side effect of the chemotherapeutic drug cisplatin is the induction of programmed cell death (apoptosis) of epithelial cells of the proximal tubule, which leads to acute renal failure (ARF). Thus, a factor that protects against cisplatin-induced cytotoxicity is highly desirable. An in vitro functional test has been used, which allows to evaluate the percentage of cisplatin-treated apoptotic cells in the presence or in the absence of a survival factor. This system utilises a cell line (LOC) derived from epithelial cells of human kidney proximal tubule, immortalised by ectopic expression of SV40 large T antigen. For the functional test, cells are plated at day 0 in 96-well plates (10³ cells/well) in 90% DMEM—10% bovine calf serum. At day 1, the medium is substituted with medium containing 0.5% bovine calf serum buffered with 50 mM HEPES pH 7.4, which is added with different dilutions of the supernatant containing the recombinant factor. Cells are incubated with these factors for 6 hours, and then further incubated in the presence of 10 μg/ml cisplatin. At day 2, cells are washed with DPBS and the percentage of apoptotic cells is evaluated by the TUNEL technique (Boehringer Mannheim). The same kind of tests can be performed using primary cultures of human epithelial cells of kidney proximal tubule (PTEC). These tests proved that Metron Factor-1 and Magic Factor-1 have protecting activity against cisplatin-induced programmed cell death.

EXAMPLE 4b Protection Against Cisplatin-induced Cytotoxicity by

Transient Gene Delivery of Metron Factor-1 and Magic Factor-1

The protective effect of Metron F-1 and Magic F-1 against cisplatin-induced cytotoxicity was further demonstrated by a transient gene delivery approach. Simian kidney epithelial cells (COS) were transfected with a control empty vector, an expression vector for Metron F-1, or an expression vector for Magic F-1. Following transfection, cells were treated for 16 hours with cisplatin (20 μg/ml) and the percentage of surviving cells in each transfection was determined. Cisplatin treatment was calibrated to cause the death of approximately 20% of the cells in the negative control. Ectopic expression of Metron F-1 or Magic F-1 increased the survival rate to about 92.3% and 94.0%, respectively.

EXAMPLE 5 Activation of the Met receptor by Metron Factor-1 and Magic Factor-1

The ability of Metron Factor-1 and Magic Factor-1 to activate the Met receptor was tested by analysing the ability of the recombinant factors to induce tyrosine phosphorylation of Met in human epithelial cells (A549). For this analysis, A549 cells at 90% confluence in a 100 mm petri dish were stimulated for 10 minutes with 1 ml of conditioned supernatant containing Metron Factor-1, Magic Factor-1 or no factor (as negative control) diluted 1:2.5 or 1:10 in DMEM. After stimulation, cells were washed in ice with PBS, lysated in 200 μl of lysis solution (1% Triton X-100, 5 mM EDTA, 150 mM NaCl, 20 mM Tris-HCl pH 7.4), added with a cocktail of protease inhibitors, immunoprecipitated for 2 hours at 4° C. with 10 μl of Sepharose-A beads covalently conjugated with an anti-Met monoclonal antibody (Naldini, L. et al., 1991, EMBO J. 10: 2867-2878), washed 3 times in the same lysis solution, and heated at 90° C. for 2 minutes to elute the absorbed proteins. These were separated by SDS-PAGE on a 8% BIS-acrylamide gel, transferred onto a membrane (Hybond-C; Amersham) and analysed by western blot. A mouse monoclonal antibody against phosphotyrosine (UBI) diluted 1:10000 was used as primary antibody and an anti-mouse IgG ovine antibody conjugated with peroxidase (Amersham) was used as secondary antibody. The secondary antibody was detected by ECL (Amersham) following the protocol provided by the manufacturer. This analysis revealed that Metron F-1 and Magic F-1 potently activate the Met receptor (FIG. 7).

EXAMPLE 6 Protection Against Chemotherapy-induced Renal Failure by Metron Factor-1 In vivo

Metron-F-1 was tested in a model of nephrotoxicity in Balb-c mice. The method used was substantially as described (Kawaida K et al., 1994, Hepatocyte growth factor prevents acute renal failure and accelerates renal regeneration in mice, Proc. Natl. Acad. Sci. 91:4357-4361). Briefly, renal failure was induced in male Balb-c mice weighing 20-25 g by an i.v. injection of 7.5 mg/kg of HgCl₂ (7 animals/group). Renal damage was assessed by analysis of Blood Urea Nitrogen (BUN) and by histological evaluation, 72 h after HgCl₂ injection. Metron-F-1 was dissolved in 0.2 M NaCl, containing 0.01% Tween 80 and 0.25% human serum albumin and administered i.v. (100 μg/kg in a posological volume of 6.6 ml/kg) 0.5 h before and 6, 12, 24, 36 and 48 h after HgCl₂ injection. Controls animals were treated with the same amount of vehicle according to the same scheme.

Metron-F-1 significantly prevented the onset of acute renal failure induced by HgCl₂, evaluated in terms of BUN (FIG. 8). BUN values were closely paralleled by the histological findings, scored by an independent investigator.

In the following sequence listing:

SEQ. ID. NO. 1: Magic F-1 DNA coding sequence;

SEQ. ID. NO. 2: Magic F-1 amino acid sequence;

SEQ. ID. NO. 3: Metron F-1 DNA coding sequence;

SEQ. ID. NO. 4: Metron F-1 amino acid sequence.

22 1 1725 DNA Artificial Sequence Magic F-1 DNA coding sequence 1 atgtgggtga ccaaactcct gccagccctg ctgctgcagc atgtcctcct gcatctcctc 60 ctgctcccca tcgccatccc ctatgcagag ggacaaagga aaagaagaaa tacaattcat 120 gaattcaaaa aatcagcaaa gactacccta atcaaaatag atccagcact gaagataaaa 180 accaaaaaag tgaatactgc agaccaatgt gctaatagat gtactaggaa taaaggactt 240 ccattcactt gcaaggcttt tgtttttgat aaagcaagaa aacaatgcct ctggttcccc 300 ttcaatagca tgtcaagtgg agtgaaaaaa gaatttggcc atgaatttga cctctatgaa 360 aacaaagact acattagaaa ctgcatcatt ggtaaaggac gcagctacaa gggaacagta 420 tctatcacta agagtggcat caaatgtcag ccctggagtt ccatgatacc acacgaacac 480 agctatcggg gtaaagacct acaggaaaac tactgtcgaa atcctcgagg ggaagaaggg 540 ggaccctggt gtttcacaag caatccagag gtacgctacg aagtctgtga cattcctcag 600 tgttcagaag ttgaatgcat gacctgcaat ggggagagtt atcgaggtct catggatcat 660 acagaatcag gcaagatttg tcagcgctgg gatcatcaga caccacaccg gcacaaattc 720 ttgcctgaaa gatatcccga caagggcttt gatgataatt attgccgcaa tcccgatggc 780 cagccgaggc catggtgcta tactcttgac cctcacaccc gctgggagta ctgtgcaatt 840 aaaacatgcg ctgacaaagc ttcgggcggt ggcggttctg gtggcggtgg ctccggcggt 900 ggcggttctc tagagggaca aaggaaaaga agaaatacaa ttcatgaatt caaaaaatca 960 gcaaagacta ccctaatcaa aatagatcca gcactgaaga taaaaaccaa aaaagtgaat 1020 actgcagacc aatgtgctaa tagatgtact aggaataaag gacttccatt cacttgcaag 1080 gcttttgttt ttgataaagc aagaaaacaa tgcctctggt tccccttcaa tagcatgtca 1140 agtggagtga aaaaagaatt tggccatgaa tttgacctct atgaaaacaa agactacatt 1200 agaaactgca tcattggtaa aggacgcagc tacaagggaa cagtatctat cactaagagt 1260 ggcatcaaat gtcagccctg gagttccatg ataccacacg aacacagcta tcggggtaaa 1320 gacctacagg aaaactactg tcgaaatcct cgaggggaag aagggggacc ctggtgtttc 1380 acaagcaatc cagaggtacg ctacgaagtc tgtgacattc ctcagtgttc agaagttgaa 1440 tgcatgacct gcaatgggga gagttatcga ggtctcatgg atcatacaga atcaggcaag 1500 atttgtcagc gctgggatca tcagacacca caccggcaca aattcttgcc tgaaagatat 1560 cccgacaagg gctttgatga taattattgc cgcaatcccg atggccagcc gaggccatgg 1620 tgctatactc ttgaccctca cacccgctgg gagtactgtg caattaaaac atgcgctgac 1680 aaagctgacg acgacgacaa acaccaccac caccaccacc actag 1725 2 574 PRT Artificial Sequence Magic F-1 recombinant protein obtained combining hairpin loop and kringle domains of human HGF and MSP 2 Met Trp Val Thr Lys Leu Leu Pro Ala Leu Leu Leu Gln His Val Leu 1 5 10 15 Leu His Leu Leu Leu Leu Pro Ile Ala Ile Pro Tyr Ala Glu Gly Gln 20 25 30 Arg Lys Arg Arg Asn Thr Ile His Glu Phe Lys Lys Ser Ala Lys Thr 35 40 45 Thr Leu Ile Lys Ile Asp Pro Ala Leu Lys Ile Lys Thr Lys Lys Val 50 55 60 Asn Thr Ala Asp Gln Cys Ala Asn Arg Cys Thr Arg Asn Lys Gly Leu 65 70 75 80 Pro Phe Thr Cys Lys Ala Phe Val Phe Asp Lys Ala Arg Lys Gln Cys 85 90 95 Leu Trp Phe Pro Phe Asn Ser Met Ser Ser Gly Val Lys Lys Glu Phe 100 105 110 Gly His Glu Phe Asp Leu Tyr Glu Asn Lys Asp Tyr Ile Arg Asn Cys 115 120 125 Ile Ile Gly Lys Gly Arg Ser Tyr Lys Gly Thr Val Ser Ile Thr Lys 130 135 140 Ser Gly Ile Lys Cys Gln Pro Trp Ser Ser Met Ile Pro His Glu His 145 150 155 160 Ser Tyr Arg Gly Lys Asp Leu Gln Glu Asn Tyr Cys Arg Asn Pro Arg 165 170 175 Gly Glu Glu Gly Gly Pro Trp Cys Phe Thr Ser Asn Pro Glu Val Arg 180 185 190 Tyr Glu Val Cys Asp Ile Pro Gln Cys Ser Glu Val Glu Cys Met Thr 195 200 205 Cys Asn Gly Glu Ser Tyr Arg Gly Leu Met Asp His Thr Glu Ser Gly 210 215 220 Lys Ile Cys Gln Arg Trp Asp His Gln Thr Pro His Arg His Lys Phe 225 230 235 240 Leu Pro Glu Arg Tyr Pro Asp Lys Gly Phe Asp Asp Asn Tyr Cys Arg 245 250 255 Asn Pro Asp Gly Gln Pro Arg Pro Trp Cys Tyr Thr Leu Asp Pro His 260 265 270 Thr Arg Trp Glu Tyr Cys Ala Ile Lys Thr Cys Ala Asp Lys Ala Ser 275 280 285 Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Leu 290 295 300 Glu Gly Gln Arg Lys Arg Arg Asn Thr Ile His Glu Phe Lys Lys Ser 305 310 315 320 Ala Lys Thr Thr Leu Ile Lys Ile Asp Pro Ala Leu Lys Ile Lys Thr 325 330 335 Lys Lys Val Asn Thr Ala Asp Gln Cys Ala Asn Arg Cys Thr Arg Asn 340 345 350 Lys Gly Leu Pro Phe Thr Cys Lys Ala Phe Val Phe Asp Lys Ala Arg 355 360 365 Lys Gln Cys Leu Trp Phe Pro Phe Asn Ser Met Ser Ser Gly Val Lys 370 375 380 Lys Glu Phe Gly His Glu Phe Asp Leu Tyr Glu Asn Lys Asp Tyr Ile 385 390 395 400 Arg Asn Cys Ile Ile Gly Lys Gly Arg Ser Tyr Lys Gly Thr Val Ser 405 410 415 Ile Thr Lys Ser Gly Ile Lys Cys Gln Pro Trp Ser Ser Met Ile Pro 420 425 430 His Glu His Ser Tyr Arg Gly Lys Asp Leu Gln Glu Asn Tyr Cys Arg 435 440 445 Asn Pro Arg Gly Glu Glu Gly Gly Pro Trp Cys Phe Thr Ser Asn Pro 450 455 460 Glu Val Arg Tyr Glu Val Cys Asp Ile Pro Gln Cys Ser Glu Val Glu 465 470 475 480 Cys Met Thr Cys Asn Gly Glu Ser Tyr Arg Gly Leu Met Asp His Thr 485 490 495 Glu Ser Gly Lys Ile Cys Gln Arg Trp Asp His Gln Thr Pro His Arg 500 505 510 His Lys Phe Leu Pro Glu Arg Tyr Pro Asp Lys Gly Phe Asp Asp Asn 515 520 525 Tyr Cys Arg Asn Pro Asp Gly Gln Pro Arg Pro Trp Cys Tyr Thr Leu 530 535 540 Asp Pro His Thr Arg Trp Glu Tyr Cys Ala Ile Lys Thr Cys Ala Asp 545 550 555 560 Lys Ala Asp Asp Asp Asp Lys His His His His His His His 565 570 3 1692 DNA Artificial Sequence Metron F-1 DNA coding sequence 3 atggggtggc tcccactcct gctgcttctg actcaatgct taggggtccc tgggcagcgc 60 tcgccattga atgacttcca agtgctccgg ggcacagagc tacagcacct gctacatgcg 120 gtggtgcccg ggccttggca ggaggatgtg gcagatgctg aagagtgtgc tggtcgctgt 180 gggcccttaa tggactgccg ggccttccac tacaacgtga gcagccatgg ttgccaactg 240 ctgccatgga ctcaacactc gccccacacg aggctgcggc gttctgggcg ctgtgacctc 300 ttccagaaga aagactacgt acggacctgc atcatgaaca atggggttgg gtaccggggc 360 accatggcca cgaccgtggg tggcctgccc tgccaggctt ggagccacaa gttcccgaat 420 gatcacaagt acacgcccac tctccggaat ggcctggaag agaacttctg ccgtaaccct 480 gatggcgacc ccggaggtcc ttggtgctac acaacagacc ctgctgtgcg cttccagagc 540 tgcggcatca aatcctgccg ggaggccgcg tgtgtctggt gcaatggcga ggaataccgc 600 ggcgcggtag accgcacgga gtcagggcgc gagtgccagc gctgggatct tcagcacccg 660 caccagcacc ccttcgagcc gggcaagttc ctcgaccaag gtctggacga caactattgc 720 cggaatcctg acggctccga gcggccatgg tgctacacta cggatccgca gatcgagcga 780 gagttctgtg acctcccccg ctgcgggtcc gaggcacagc cccgcctcga gggcggtggc 840 ggttctggtg gcggtggctc cggcggtggc ggttctctag agggacaaag gaaaagaaga 900 aatacaattc atgaattcaa aaaatcagca aagactaccc taatcaaaat agatccagca 960 ctgaagataa aaaccaaaaa agtgaatact gcagaccaat gtgctaatag atgtactagg 1020 aataaaggac ttccattcac ttgcaaggct tttgtttttg ataaagcaag aaaacaatgc 1080 ctctggttcc ccttcaatag catgtcaagt ggagtgaaaa aagaatttgg ccatgaattt 1140 gacctctatg aaaacaaaga ctacattaga aactgcatca ttggtaaagg acgcagctac 1200 aagggaacag tatctatcac taagagtggc atcaaatgtc agccctggag ttccatgata 1260 ccacacgaac acagctatcg gggtaaagac ctacaggaaa actactgtcg aaatcctcga 1320 ggggaagaag ggggaccctg gtgtttcaca agcaatccag aggtacgcta cgaagtctgt 1380 gacattcctc agtgttcaga agttgaatgc atgacctgca atggggagag ttatcgaggt 1440 ctcatggatc atacagaatc aggcaagatt tgtcagcgct gggatcatca gacaccacac 1500 cggcacaaat tcttgcctga aagatatccc gacaagggct ttgatgataa ttattgccgc 1560 aatcccgatg gccagccgag gccatggtgc tatactcttg accctcacac ccgctgggag 1620 tactgtgcaa ttaaaacatg cgctgacaaa gctgacgacg acgacaaaca ccaccaccac 1680 caccaccact ag 1692 4 563 PRT Artificial Sequence Metron F-1 recombinant protein obtained combining hairpin loop and kringle domains of human HGF and MSP 4 Met Gly Trp Leu Pro Leu Leu Leu Leu Leu Thr Gln Cys Leu Gly Val 1 5 10 15 Pro Gly Gln Arg Ser Pro Leu Asn Asp Phe Gln Val Leu Arg Gly Thr 20 25 30 Glu Leu Gln His Leu Leu His Ala Val Val Pro Gly Pro Trp Gln Glu 35 40 45 Asp Val Ala Asp Ala Glu Glu Cys Ala Gly Arg Cys Gly Pro Leu Met 50 55 60 Asp Cys Arg Ala Phe His Tyr Asn Val Ser Ser His Gly Cys Gln Leu 65 70 75 80 Leu Pro Trp Thr Gln His Ser Pro His Thr Arg Leu Arg Arg Ser Gly 85 90 95 Arg Cys Asp Leu Phe Gln Lys Lys Asp Tyr Val Arg Thr Cys Ile Met 100 105 110 Asn Asn Gly Val Gly Tyr Arg Gly Thr Met Ala Thr Thr Val Gly Gly 115 120 125 Leu Pro Cys Gln Ala Trp Ser His Lys Phe Pro Asn Asp His Lys Tyr 130 135 140 Thr Pro Thr Leu Arg Asn Gly Leu Glu Glu Asn Phe Cys Arg Asn Pro 145 150 155 160 Asp Gly Asp Pro Gly Gly Pro Trp Cys Tyr Thr Thr Asp Pro Ala Val 165 170 175 Arg Phe Gln Ser Cys Gly Ile Lys Ser Cys Arg Glu Ala Ala Cys Val 180 185 190 Trp Cys Asn Gly Glu Glu Tyr Arg Gly Ala Val Asp Arg Thr Glu Ser 195 200 205 Gly Arg Glu Cys Gln Arg Trp Asp Leu Gln His Pro His Gln His Pro 210 215 220 Phe Glu Pro Gly Lys Phe Leu Asp Gln Gly Leu Asp Asp Asn Tyr Cys 225 230 235 240 Arg Asn Pro Asp Gly Ser Glu Arg Pro Trp Cys Tyr Thr Thr Asp Pro 245 250 255 Gln Ile Glu Arg Glu Phe Cys Asp Leu Pro Arg Cys Gly Ser Glu Ala 260 265 270 Gln Pro Arg Leu Glu Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Gly 275 280 285 Gly Gly Gly Ser Leu Glu Gly Gln Arg Lys Arg Arg Asn Thr Ile His 290 295 300 Glu Phe Lys Lys Ser Ala Lys Thr Thr Leu Ile Lys Ile Asp Pro Ala 305 310 315 320 Leu Lys Ile Lys Thr Lys Lys Val Asn Thr Ala Asp Gln Cys Ala Asn 325 330 335 Arg Cys Thr Arg Asn Lys Gly Leu Pro Phe Thr Cys Lys Ala Phe Val 340 345 350 Phe Asp Lys Ala Arg Lys Gln Cys Leu Trp Phe Pro Phe Asn Ser Met 355 360 365 Ser Ser Gly Val Lys Lys Glu Phe Gly His Glu Phe Asp Leu Tyr Glu 370 375 380 Asn Lys Asp Tyr Ile Arg Asn Cys Ile Ile Gly Lys Gly Arg Ser Tyr 385 390 395 400 Lys Gly Thr Val Ser Ile Thr Lys Ser Gly Ile Lys Cys Gln Pro Trp 405 410 415 Ser Ser Met Ile Pro His Glu His Ser Tyr Arg Gly Lys Asp Leu Gln 420 425 430 Glu Asn Tyr Cys Arg Asn Pro Arg Gly Glu Glu Gly Gly Pro Trp Cys 435 440 445 Phe Thr Ser Asn Pro Glu Val Arg Tyr Glu Val Cys Asp Ile Pro Gln 450 455 460 Cys Ser Glu Val Glu Cys Met Thr Cys Asn Gly Glu Ser Tyr Arg Gly 465 470 475 480 Leu Met Asp His Thr Glu Ser Gly Lys Ile Cys Gln Arg Trp Asp His 485 490 495 Gln Thr Pro His Arg His Lys Phe Leu Pro Glu Arg Tyr Pro Asp Lys 500 505 510 Gly Phe Asp Asp Asn Tyr Cys Arg Asn Pro Asp Gly Gln Pro Arg Pro 515 520 525 Trp Cys Tyr Thr Leu Asp Pro His Thr Arg Trp Glu Tyr Cys Ala Ile 530 535 540 Lys Thr Cys Ala Asp Lys Ala Asp Asp Asp Asp Lys His His His His 545 550 555 560 His His His 5 36 DNA Artificial Sequence Oligonucleotide primer targeted to human MSP cDNA 5 cgcgcggaat tccaccatgg ggtggctccc actcct 36 6 36 DNA Artificial Sequence Oligonucleotide primer targeted to human MSP cDNA 6 cgcgcgctcg aggcggggct gtgcctcgga cccgca 36 7 36 DNA Artificial Sequence Oligonucleotide primer targeted to human HGF cDNA 7 cgcgcgtcta gagggacaaa ggaaaagaag aaatac 36 8 36 DNA Artificial Sequence Oligonucleotide primer targeted to human HGF cDNA 8 cgcgcgaagc tttgtcagcg catgttttaa ttgcac 36 9 50 DNA Artificial Sequence Oligonucleotide primer used to synthesize the Metron Factor-1 linker sequence 9 tcgagggcgg tggcggttct ggtggcggtg gctccggcgg tggcggttct 50 10 50 DNA Artificial Sequence Oligonucleotide primer used to synthesize the Metron Factor-1 linker sequence 10 ctagagaacc gccaccgccg gagccaccgc caccagaacc gccaccgccc 50 11 50 DNA Artificial Sequence Oligonucleotide primer used to insert the tag sequence in Metron Factor-1 11 agctgacgac gacgacaaac accaccacca ccaccaccac tagggtcgac 50 12 50 DNA Artificial Sequence Oligonucleotide primer used to insert the tag sequence in Metron Factor-1 12 agctgtcgac cctagtggtg gtggtggtgg tggtgtttgt cgtcgtcgtc 50 13 36 DNA Artificial Sequence Oligonucleotide primer targeted to human HGF cDNA 13 cgcgcgggat ccgccagccg ctccagcagc accatg 36 14 36 DNA Artificial Sequence Oligonucleotide primer targeted to human HGF cDNA 14 cgcgcgaagc tttgtcagcg catgttttaa ttgcac 36 15 52 DNA Artificial Sequence Oligonucleotide primer used to synthesize the Magic Factor-1 linker sequence 15 agcttcgggc ggtggcggtt ctggtggcgg tggctccggc ggtggcggtt ct 52 16 52 DNA Artificial Sequence Oligonucleotide primer used to synthesize the Magic Factor-1 linker sequence 16 ctagagaacc gccaccgccg gagccaccgc caccagaacc gccaccgccc ga 52 17 2172 DNA Homo sapiens CDS (1)..(2172) 17 atg tgg gtg acc aaa ctc ctg cca gcc ctg ctg ctg cag cat gtc ctc 48 Met Trp Val Thr Lys Leu Leu Pro Ala Leu Leu Leu Gln His Val Leu 1 5 10 15 ctg cat ctc ctc ctg ctc ccc atc gcc atc ccc tat gca gag gga caa 96 Leu His Leu Leu Leu Leu Pro Ile Ala Ile Pro Tyr Ala Glu Gly Gln 20 25 30 agg aaa aga aga aat aca att cat gaa ttc aaa aaa tca gca aag act 144 Arg Lys Arg Arg Asn Thr Ile His Glu Phe Lys Lys Ser Ala Lys Thr 35 40 45 acc cta atc aaa ata gat cca gca ctg aag ata aaa acc aaa aaa gtg 192 Thr Leu Ile Lys Ile Asp Pro Ala Leu Lys Ile Lys Thr Lys Lys Val 50 55 60 aat act gca gac caa tgt gct aat aga tgt act agg aat aaa gga ctt 240 Asn Thr Ala Asp Gln Cys Ala Asn Arg Cys Thr Arg Asn Lys Gly Leu 65 70 75 80 cca ttc act tgc aag gct ttt gtt ttt gat aaa gca aga aaa caa tgc 288 Pro Phe Thr Cys Lys Ala Phe Val Phe Asp Lys Ala Arg Lys Gln Cys 85 90 95 ctc tgg ttc ccc ttc aat agc atg tca agt gga gtg aaa aaa gaa ttt 336 Leu Trp Phe Pro Phe Asn Ser Met Ser Ser Gly Val Lys Lys Glu Phe 100 105 110 ggc cat gaa ttt gac ctc tat gaa aac aaa gac tac att aga aac tgc 384 Gly His Glu Phe Asp Leu Tyr Glu Asn Lys Asp Tyr Ile Arg Asn Cys 115 120 125 atc att ggt aaa gga cgc agc tac aag gga aca gta tct atc act aag 432 Ile Ile Gly Lys Gly Arg Ser Tyr Lys Gly Thr Val Ser Ile Thr Lys 130 135 140 agt ggc atc aaa tgt cag ccc tgg agt tcc atg ata cca cac gaa cac 480 Ser Gly Ile Lys Cys Gln Pro Trp Ser Ser Met Ile Pro His Glu His 145 150 155 160 agc tat cgg ggt aaa gac cta cag gaa aac tac tgt cga aat cct cga 528 Ser Tyr Arg Gly Lys Asp Leu Gln Glu Asn Tyr Cys Arg Asn Pro Arg 165 170 175 ggg gaa gaa ggg gga ccc tgg tgt ttc aca agc aat cca gag gta cgc 576 Gly Glu Glu Gly Gly Pro Trp Cys Phe Thr Ser Asn Pro Glu Val Arg 180 185 190 tac gaa gtc tgt gac att cct cag tgt tca gaa gtt gaa tgc atg acc 624 Tyr Glu Val Cys Asp Ile Pro Gln Cys Ser Glu Val Glu Cys Met Thr 195 200 205 tgc aat ggg gag agt tat cga ggt ctc atg gat cat aca gaa tca ggc 672 Cys Asn Gly Glu Ser Tyr Arg Gly Leu Met Asp His Thr Glu Ser Gly 210 215 220 aag att tgt cag cgc tgg gat cat cag aca cca cac cgg cac aaa ttc 720 Lys Ile Cys Gln Arg Trp Asp His Gln Thr Pro His Arg His Lys Phe 225 230 235 240 ttg cct gaa aga tat ccc gac aag ggc ttt gat gat aat tat tgc cgc 768 Leu Pro Glu Arg Tyr Pro Asp Lys Gly Phe Asp Asp Asn Tyr Cys Arg 245 250 255 aat ccc gat ggc cag ccg agg cca tgg tgc tat act ctt gac cct cac 816 Asn Pro Asp Gly Gln Pro Arg Pro Trp Cys Tyr Thr Leu Asp Pro His 260 265 270 acc cgc tgg gag tac tgt gca att aaa aca tgc gct gac aat act atg 864 Thr Arg Trp Glu Tyr Cys Ala Ile Lys Thr Cys Ala Asp Asn Thr Met 275 280 285 aat gac act gat gtt cct ttg gaa aca act gaa tgc atc caa ggt caa 912 Asn Asp Thr Asp Val Pro Leu Glu Thr Thr Glu Cys Ile Gln Gly Gln 290 295 300 gga gaa ggc tac agg ggc act gtc aat acc att tgg aat gga att cca 960 Gly Glu Gly Tyr Arg Gly Thr Val Asn Thr Ile Trp Asn Gly Ile Pro 305 310 315 320 tgt cag cgt tgg gat tct cag tat cct cac gag cat gac atg act cct 1008 Cys Gln Arg Trp Asp Ser Gln Tyr Pro His Glu His Asp Met Thr Pro 325 330 335 gaa aat ttc aag tgc aag gac cta cga gaa aat tac tgc cga aat cca 1056 Glu Asn Phe Lys Cys Lys Asp Leu Arg Glu Asn Tyr Cys Arg Asn Pro 340 345 350 gat ggg tct gaa tca ccc tgg tgt ttt acc act gat cca aac atc cga 1104 Asp Gly Ser Glu Ser Pro Trp Cys Phe Thr Thr Asp Pro Asn Ile Arg 355 360 365 gtt ggc tac tgc tcc caa att cca aac tgt gat atg tca cat gga caa 1152 Val Gly Tyr Cys Ser Gln Ile Pro Asn Cys Asp Met Ser His Gly Gln 370 375 380 gat tgt tat cgt ggg aat ggc aaa aat tat atg ggc aac tta tcc caa 1200 Asp Cys Tyr Arg Gly Asn Gly Lys Asn Tyr Met Gly Asn Leu Ser Gln 385 390 395 400 aca aga tct gga cta aca tgt tca atg tgg gac aag aac atg gaa gac 1248 Thr Arg Ser Gly Leu Thr Cys Ser Met Trp Asp Lys Asn Met Glu Asp 405 410 415 tta cat cgt cat atc ttc tgg gaa cca gat gca agt aag ctg aat gag 1296 Leu His Arg His Ile Phe Trp Glu Pro Asp Ala Ser Lys Leu Asn Glu 420 425 430 aat tac tgc cga aat cca gat gat gat gct cat gga ccc tgg tgc tac 1344 Asn Tyr Cys Arg Asn Pro Asp Asp Asp Ala His Gly Pro Trp Cys Tyr 435 440 445 acg gga aat cca ctc att cct tgg gat tat tgc cct att tct cgt tgt 1392 Thr Gly Asn Pro Leu Ile Pro Trp Asp Tyr Cys Pro Ile Ser Arg Cys 450 455 460 gaa ggt gat acc aca cct aca ata gtc aat tta gac cat ccc gta ata 1440 Glu Gly Asp Thr Thr Pro Thr Ile Val Asn Leu Asp His Pro Val Ile 465 470 475 480 tct tgt gcc aaa acg aaa caa ttg cga gtt gta aat ggg att cca aca 1488 Ser Cys Ala Lys Thr Lys Gln Leu Arg Val Val Asn Gly Ile Pro Thr 485 490 495 cga aca aac ata gga tgg atg gtt agt ttg aga tac aga aat aaa cat 1536 Arg Thr Asn Ile Gly Trp Met Val Ser Leu Arg Tyr Arg Asn Lys His 500 505 510 atc tgc gga gga tca ttg ata aag gag agt tgg gtt ctt act gca cga 1584 Ile Cys Gly Gly Ser Leu Ile Lys Glu Ser Trp Val Leu Thr Ala Arg 515 520 525 cag tgt ttc cct tct cga gac ttg aaa gat tat gaa gct tgg ctt gga 1632 Gln Cys Phe Pro Ser Arg Asp Leu Lys Asp Tyr Glu Ala Trp Leu Gly 530 535 540 att cat gat gtc cac gga aga gga gat gag aaa tgc aaa cag gtt ctc 1680 Ile His Asp Val His Gly Arg Gly Asp Glu Lys Cys Lys Gln Val Leu 545 550 555 560 aat gtt tcc cag ctg gta tat ggc cct gaa gga tca gat ctg gtt tta 1728 Asn Val Ser Gln Leu Val Tyr Gly Pro Glu Gly Ser Asp Leu Val Leu 565 570 575 atg aag ctt gcc agg cct gct gtc ctg gat gat ttt gtt agt acg att 1776 Met Lys Leu Ala Arg Pro Ala Val Leu Asp Asp Phe Val Ser Thr Ile 580 585 590 gat tta cct aat tat gga tgc aca att cct gaa aag acc agt tgc agt 1824 Asp Leu Pro Asn Tyr Gly Cys Thr Ile Pro Glu Lys Thr Ser Cys Ser 595 600 605 gtt tat ggc tgg ggc tac act gga ttg atc aac tat gat ggc cta tta 1872 Val Tyr Gly Trp Gly Tyr Thr Gly Leu Ile Asn Tyr Asp Gly Leu Leu 610 615 620 cga gtg gca cat ctc tat ata atg gga aat gag aaa tgc agc cag cat 1920 Arg Val Ala His Leu Tyr Ile Met Gly Asn Glu Lys Cys Ser Gln His 625 630 635 640 cat cga ggg aag gtg act ctg aat gag tct gaa ata tgt gct ggg gct 1968 His Arg Gly Lys Val Thr Leu Asn Glu Ser Glu Ile Cys Ala Gly Ala 645 650 655 gaa aag att gga tca gga cca tgt gag ggg gat tat ggt ggc cca ctt 2016 Glu Lys Ile Gly Ser Gly Pro Cys Glu Gly Asp Tyr Gly Gly Pro Leu 660 665 670 gtt tgt gag caa cat aaa atg aga atg gtt ctt ggt gtc att gtt cct 2064 Val Cys Glu Gln His Lys Met Arg Met Val Leu Gly Val Ile Val Pro 675 680 685 ggt cgt gga tgt gcc att cca aat cgt cct ggt att ttt gtc cga gta 2112 Gly Arg Gly Cys Ala Ile Pro Asn Arg Pro Gly Ile Phe Val Arg Val 690 695 700 gca tat tat gca aaa tgg ata cac aaa att att tta aca tat aag gta 2160 Ala Tyr Tyr Ala Lys Trp Ile His Lys Ile Ile Leu Thr Tyr Lys Val 705 710 715 720 cca cag tca tag 2172 Pro Gln Ser 18 723 PRT Homo sapiens 18 Met Trp Val Thr Lys Leu Leu Pro Ala Leu Leu Leu Gln His Val Leu 1 5 10 15 Leu His Leu Leu Leu Leu Pro Ile Ala Ile Pro Tyr Ala Glu Gly Gln 20 25 30 Arg Lys Arg Arg Asn Thr Ile His Glu Phe Lys Lys Ser Ala Lys Thr 35 40 45 Thr Leu Ile Lys Ile Asp Pro Ala Leu Lys Ile Lys Thr Lys Lys Val 50 55 60 Asn Thr Ala Asp Gln Cys Ala Asn Arg Cys Thr Arg Asn Lys Gly Leu 65 70 75 80 Pro Phe Thr Cys Lys Ala Phe Val Phe Asp Lys Ala Arg Lys Gln Cys 85 90 95 Leu Trp Phe Pro Phe Asn Ser Met Ser Ser Gly Val Lys Lys Glu Phe 100 105 110 Gly His Glu Phe Asp Leu Tyr Glu Asn Lys Asp Tyr Ile Arg Asn Cys 115 120 125 Ile Ile Gly Lys Gly Arg Ser Tyr Lys Gly Thr Val Ser Ile Thr Lys 130 135 140 Ser Gly Ile Lys Cys Gln Pro Trp Ser Ser Met Ile Pro His Glu His 145 150 155 160 Ser Tyr Arg Gly Lys Asp Leu Gln Glu Asn Tyr Cys Arg Asn Pro Arg 165 170 175 Gly Glu Glu Gly Gly Pro Trp Cys Phe Thr Ser Asn Pro Glu Val Arg 180 185 190 Tyr Glu Val Cys Asp Ile Pro Gln Cys Ser Glu Val Glu Cys Met Thr 195 200 205 Cys Asn Gly Glu Ser Tyr Arg Gly Leu Met Asp His Thr Glu Ser Gly 210 215 220 Lys Ile Cys Gln Arg Trp Asp His Gln Thr Pro His Arg His Lys Phe 225 230 235 240 Leu Pro Glu Arg Tyr Pro Asp Lys Gly Phe Asp Asp Asn Tyr Cys Arg 245 250 255 Asn Pro Asp Gly Gln Pro Arg Pro Trp Cys Tyr Thr Leu Asp Pro His 260 265 270 Thr Arg Trp Glu Tyr Cys Ala Ile Lys Thr Cys Ala Asp Asn Thr Met 275 280 285 Asn Asp Thr Asp Val Pro Leu Glu Thr Thr Glu Cys Ile Gln Gly Gln 290 295 300 Gly Glu Gly Tyr Arg Gly Thr Val Asn Thr Ile Trp Asn Gly Ile Pro 305 310 315 320 Cys Gln Arg Trp Asp Ser Gln Tyr Pro His Glu His Asp Met Thr Pro 325 330 335 Glu Asn Phe Lys Cys Lys Asp Leu Arg Glu Asn Tyr Cys Arg Asn Pro 340 345 350 Asp Gly Ser Glu Ser Pro Trp Cys Phe Thr Thr Asp Pro Asn Ile Arg 355 360 365 Val Gly Tyr Cys Ser Gln Ile Pro Asn Cys Asp Met Ser His Gly Gln 370 375 380 Asp Cys Tyr Arg Gly Asn Gly Lys Asn Tyr Met Gly Asn Leu Ser Gln 385 390 395 400 Thr Arg Ser Gly Leu Thr Cys Ser Met Trp Asp Lys Asn Met Glu Asp 405 410 415 Leu His Arg His Ile Phe Trp Glu Pro Asp Ala Ser Lys Leu Asn Glu 420 425 430 Asn Tyr Cys Arg Asn Pro Asp Asp Asp Ala His Gly Pro Trp Cys Tyr 435 440 445 Thr Gly Asn Pro Leu Ile Pro Trp Asp Tyr Cys Pro Ile Ser Arg Cys 450 455 460 Glu Gly Asp Thr Thr Pro Thr Ile Val Asn Leu Asp His Pro Val Ile 465 470 475 480 Ser Cys Ala Lys Thr Lys Gln Leu Arg Val Val Asn Gly Ile Pro Thr 485 490 495 Arg Thr Asn Ile Gly Trp Met Val Ser Leu Arg Tyr Arg Asn Lys His 500 505 510 Ile Cys Gly Gly Ser Leu Ile Lys Glu Ser Trp Val Leu Thr Ala Arg 515 520 525 Gln Cys Phe Pro Ser Arg Asp Leu Lys Asp Tyr Glu Ala Trp Leu Gly 530 535 540 Ile His Asp Val His Gly Arg Gly Asp Glu Lys Cys Lys Gln Val Leu 545 550 555 560 Asn Val Ser Gln Leu Val Tyr Gly Pro Glu Gly Ser Asp Leu Val Leu 565 570 575 Met Lys Leu Ala Arg Pro Ala Val Leu Asp Asp Phe Val Ser Thr Ile 580 585 590 Asp Leu Pro Asn Tyr Gly Cys Thr Ile Pro Glu Lys Thr Ser Cys Ser 595 600 605 Val Tyr Gly Trp Gly Tyr Thr Gly Leu Ile Asn Tyr Asp Gly Leu Leu 610 615 620 Arg Val Ala His Leu Tyr Ile Met Gly Asn Glu Lys Cys Ser Gln His 625 630 635 640 His Arg Gly Lys Val Thr Leu Asn Glu Ser Glu Ile Cys Ala Gly Ala 645 650 655 Glu Lys Ile Gly Ser Gly Pro Cys Glu Gly Asp Tyr Gly Gly Pro Leu 660 665 670 Val Cys Glu Gln His Lys Met Arg Met Val Leu Gly Val Ile Val Pro 675 680 685 Gly Arg Gly Cys Ala Ile Pro Asn Arg Pro Gly Ile Phe Val Arg Val 690 695 700 Ala Tyr Tyr Ala Lys Trp Ile His Lys Ile Ile Leu Thr Tyr Lys Val 705 710 715 720 Pro Gln Ser 19 2136 DNA Homo sapiens CDS (1)..(2136) 19 atg ggg tgg ctc cca ctc ctg ctg ctt ctg act caa tgc tta ggg gtc 48 Met Gly Trp Leu Pro Leu Leu Leu Leu Leu Thr Gln Cys Leu Gly Val 1 5 10 15 cct ggg cag cgc tcg cca ttg aat gac ttc caa gtg ctc cgg ggc aca 96 Pro Gly Gln Arg Ser Pro Leu Asn Asp Phe Gln Val Leu Arg Gly Thr 20 25 30 gag cta cag cac ctg cta cat gcg gtg gtg ccc ggg cct tgg cag gag 144 Glu Leu Gln His Leu Leu His Ala Val Val Pro Gly Pro Trp Gln Glu 35 40 45 gat gtg gca gat gct gaa gag tgt gct ggt cgc tgt ggg ccc tta atg 192 Asp Val Ala Asp Ala Glu Glu Cys Ala Gly Arg Cys Gly Pro Leu Met 50 55 60 gac tgc cgg gcc ttc cac tac aac gtg agc agc cat ggt tgc caa ctg 240 Asp Cys Arg Ala Phe His Tyr Asn Val Ser Ser His Gly Cys Gln Leu 65 70 75 80 ctg cca tgg act caa cac tcg ccc cac acg agg ctg cgg cgt tct ggg 288 Leu Pro Trp Thr Gln His Ser Pro His Thr Arg Leu Arg Arg Ser Gly 85 90 95 cgc tgt gac ctc ttc cag aag aaa gac tac gta cgg acc tgc atc atg 336 Arg Cys Asp Leu Phe Gln Lys Lys Asp Tyr Val Arg Thr Cys Ile Met 100 105 110 aac aat ggg gtt ggg tac cgg ggc acc atg gcc acg acc gtg ggt ggc 384 Asn Asn Gly Val Gly Tyr Arg Gly Thr Met Ala Thr Thr Val Gly Gly 115 120 125 ctg ccc tgc cag gct tgg agc cac aag ttc ccg aat gat cac aag tac 432 Leu Pro Cys Gln Ala Trp Ser His Lys Phe Pro Asn Asp His Lys Tyr 130 135 140 acg ccc act ctc cgg aat ggc ctg gaa gag aac ttc tgc cgt aac cct 480 Thr Pro Thr Leu Arg Asn Gly Leu Glu Glu Asn Phe Cys Arg Asn Pro 145 150 155 160 gat ggc gac ccc gga ggt cct tgg tgc tac aca aca gac cct gct gtg 528 Asp Gly Asp Pro Gly Gly Pro Trp Cys Tyr Thr Thr Asp Pro Ala Val 165 170 175 cgc ttc cag agc tgc ggc atc aaa tcc tgc cgg gag gcc gcg tgt gtc 576 Arg Phe Gln Ser Cys Gly Ile Lys Ser Cys Arg Glu Ala Ala Cys Val 180 185 190 tgg tgc aat ggc gag gaa tac cgc ggc gcg gta gac cgc acg gag tca 624 Trp Cys Asn Gly Glu Glu Tyr Arg Gly Ala Val Asp Arg Thr Glu Ser 195 200 205 ggg cgc gag tgc cag cgc tgg gat ctt cag cac ccg cac cag cac ccc 672 Gly Arg Glu Cys Gln Arg Trp Asp Leu Gln His Pro His Gln His Pro 210 215 220 ttc gag ccg ggc aag ttc ctc gac caa ggt ctg gac gac aac tat tgc 720 Phe Glu Pro Gly Lys Phe Leu Asp Gln Gly Leu Asp Asp Asn Tyr Cys 225 230 235 240 cgg aat cct gac ggc tcc gag cgg cca tgg tgc tac act acg gat ccg 768 Arg Asn Pro Asp Gly Ser Glu Arg Pro Trp Cys Tyr Thr Thr Asp Pro 245 250 255 cag atc gag cga gag ttc tgt gac ctc ccc cgc tgc ggg tcc gag gca 816 Gln Ile Glu Arg Glu Phe Cys Asp Leu Pro Arg Cys Gly Ser Glu Ala 260 265 270 cag ccc cgc caa gag gcc aca act gtc agc tgc ttc cgc ggg aag ggt 864 Gln Pro Arg Gln Glu Ala Thr Thr Val Ser Cys Phe Arg Gly Lys Gly 275 280 285 gag ggc tac cgg ggc aca gcc aat acc acc act gcg ggc gta cct tgc 912 Glu Gly Tyr Arg Gly Thr Ala Asn Thr Thr Thr Ala Gly Val Pro Cys 290 295 300 cag cgt tgg gac gcg caa atc ccg cat cag cac cga ttt acg cca gaa 960 Gln Arg Trp Asp Ala Gln Ile Pro His Gln His Arg Phe Thr Pro Glu 305 310 315 320 aaa tac gcg tgc aaa gac ctt cgg gag aac ttc tgc cgg aac ccc gac 1008 Lys Tyr Ala Cys Lys Asp Leu Arg Glu Asn Phe Cys Arg Asn Pro Asp 325 330 335 ggc tca gag gcg ccc tgg tgc ttc aca ctg cgg ccc ggc atg cgc gcg 1056 Gly Ser Glu Ala Pro Trp Cys Phe Thr Leu Arg Pro Gly Met Arg Ala 340 345 350 gcc ttt tgc tac cag atc cgg cgt tgt aca gac gac gtg cgg ccc cag 1104 Ala Phe Cys Tyr Gln Ile Arg Arg Cys Thr Asp Asp Val Arg Pro Gln 355 360 365 gac tgc tac cac ggc gca ggg gag cag tac cgc ggc acg gtc agc aag 1152 Asp Cys Tyr His Gly Ala Gly Glu Gln Tyr Arg Gly Thr Val Ser Lys 370 375 380 acc cgc aag ggt gtc cag tgc cag cgc tgg tcc gct gag acg ccg cac 1200 Thr Arg Lys Gly Val Gln Cys Gln Arg Trp Ser Ala Glu Thr Pro His 385 390 395 400 aag ccg cag ttc acg ttt acc tcc gaa ccg cat gca caa ctg gag gag 1248 Lys Pro Gln Phe Thr Phe Thr Ser Glu Pro His Ala Gln Leu Glu Glu 405 410 415 aac ttc tgc cgg aac cca gat ggg gat agc cat ggg ccc tgg tgc tac 1296 Asn Phe Cys Arg Asn Pro Asp Gly Asp Ser His Gly Pro Trp Cys Tyr 420 425 430 acg atg gac cca agg acc cca ttc gac tac tgt gcc ctg cga cgc tgc 1344 Thr Met Asp Pro Arg Thr Pro Phe Asp Tyr Cys Ala Leu Arg Arg Cys 435 440 445 gct gat gac cag ccg cca tca atc ctg gac ccc cca gac cag gtg cag 1392 Ala Asp Asp Gln Pro Pro Ser Ile Leu Asp Pro Pro Asp Gln Val Gln 450 455 460 ttt gag aag tgt ggc aag agg gtg gat cgg ctg gat cag cgg cgt tcc 1440 Phe Glu Lys Cys Gly Lys Arg Val Asp Arg Leu Asp Gln Arg Arg Ser 465 470 475 480 aag ctg cgc gtg gtt ggg ggc cat ccg ggc aac tca ccc tgg aca gtc 1488 Lys Leu Arg Val Val Gly Gly His Pro Gly Asn Ser Pro Trp Thr Val 485 490 495 agc ttg cgg aat cgg cag ggc cag cat ttc tgc ggg ggg tct cta gtg 1536 Ser Leu Arg Asn Arg Gln Gly Gln His Phe Cys Gly Gly Ser Leu Val 500 505 510 aag gag cag tgg ata ctg act gcc cgg cag tgc ttc tcc tcc tgc cat 1584 Lys Glu Gln Trp Ile Leu Thr Ala Arg Gln Cys Phe Ser Ser Cys His 515 520 525 atg cct ctc acg ggc tat gag gta tgg ttg ggc acc ctg ttc cag aac 1632 Met Pro Leu Thr Gly Tyr Glu Val Trp Leu Gly Thr Leu Phe Gln Asn 530 535 540 cca cag cat gga gag cca agc cta cag cgg gtc cca gta gcc aag atg 1680 Pro Gln His Gly Glu Pro Ser Leu Gln Arg Val Pro Val Ala Lys Met 545 550 555 560 gtg tgt ggg ccc tca ggc tcc cag ctt gtc ctg ctc aag ctg gag aga 1728 Val Cys Gly Pro Ser Gly Ser Gln Leu Val Leu Leu Lys Leu Glu Arg 565 570 575 tct gtg acc ctg aac cag cgt gtg gcc ctg atc tgc ctg ccc cct gaa 1776 Ser Val Thr Leu Asn Gln Arg Val Ala Leu Ile Cys Leu Pro Pro Glu 580 585 590 tgg tat gtg gtg cct cca ggg acc aag tgt gag att gca ggc tgg ggt 1824 Trp Tyr Val Val Pro Pro Gly Thr Lys Cys Glu Ile Ala Gly Trp Gly 595 600 605 gag acc aaa ggt acg ggt aat gac aca gtc cta aat gtg gcc ttt ctg 1872 Glu Thr Lys Gly Thr Gly Asn Asp Thr Val Leu Asn Val Ala Phe Leu 610 615 620 aat gtt atc tcc aac cag gag tgt aac atc aag cac cga gga cgt gtg 1920 Asn Val Ile Ser Asn Gln Glu Cys Asn Ile Lys His Arg Gly Arg Val 625 630 635 640 cgg gag agt gag atg tgc act gag gga ctg ttg gcc cct gtg ggg gcc 1968 Arg Glu Ser Glu Met Cys Thr Glu Gly Leu Leu Ala Pro Val Gly Ala 645 650 655 tgt gag ggt gac tac ggg ggc cca ctt gcc tgc ttt acc cac aac tgc 2016 Cys Glu Gly Asp Tyr Gly Gly Pro Leu Ala Cys Phe Thr His Asn Cys 660 665 670 tgg gtc ctg gaa gga att ata atc ccc aac cga gta tgc gca agg tcc 2064 Trp Val Leu Glu Gly Ile Ile Ile Pro Asn Arg Val Cys Ala Arg Ser 675 680 685 cgc tgg cca gct gtc ttc acg cgt gtc tct gtg ttt gtg gac tgg att 2112 Arg Trp Pro Ala Val Phe Thr Arg Val Ser Val Phe Val Asp Trp Ile 690 695 700 cac aag gtc atg aga ctg ggt tag 2136 His Lys Val Met Arg Leu Gly 705 710 20 711 PRT Homo sapiens 20 Met Gly Trp Leu Pro Leu Leu Leu Leu Leu Thr Gln Cys Leu Gly Val 1 5 10 15 Pro Gly Gln Arg Ser Pro Leu Asn Asp Phe Gln Val Leu Arg Gly Thr 20 25 30 Glu Leu Gln His Leu Leu His Ala Val Val Pro Gly Pro Trp Gln Glu 35 40 45 Asp Val Ala Asp Ala Glu Glu Cys Ala Gly Arg Cys Gly Pro Leu Met 50 55 60 Asp Cys Arg Ala Phe His Tyr Asn Val Ser Ser His Gly Cys Gln Leu 65 70 75 80 Leu Pro Trp Thr Gln His Ser Pro His Thr Arg Leu Arg Arg Ser Gly 85 90 95 Arg Cys Asp Leu Phe Gln Lys Lys Asp Tyr Val Arg Thr Cys Ile Met 100 105 110 Asn Asn Gly Val Gly Tyr Arg Gly Thr Met Ala Thr Thr Val Gly Gly 115 120 125 Leu Pro Cys Gln Ala Trp Ser His Lys Phe Pro Asn Asp His Lys Tyr 130 135 140 Thr Pro Thr Leu Arg Asn Gly Leu Glu Glu Asn Phe Cys Arg Asn Pro 145 150 155 160 Asp Gly Asp Pro Gly Gly Pro Trp Cys Tyr Thr Thr Asp Pro Ala Val 165 170 175 Arg Phe Gln Ser Cys Gly Ile Lys Ser Cys Arg Glu Ala Ala Cys Val 180 185 190 Trp Cys Asn Gly Glu Glu Tyr Arg Gly Ala Val Asp Arg Thr Glu Ser 195 200 205 Gly Arg Glu Cys Gln Arg Trp Asp Leu Gln His Pro His Gln His Pro 210 215 220 Phe Glu Pro Gly Lys Phe Leu Asp Gln Gly Leu Asp Asp Asn Tyr Cys 225 230 235 240 Arg Asn Pro Asp Gly Ser Glu Arg Pro Trp Cys Tyr Thr Thr Asp Pro 245 250 255 Gln Ile Glu Arg Glu Phe Cys Asp Leu Pro Arg Cys Gly Ser Glu Ala 260 265 270 Gln Pro Arg Gln Glu Ala Thr Thr Val Ser Cys Phe Arg Gly Lys Gly 275 280 285 Glu Gly Tyr Arg Gly Thr Ala Asn Thr Thr Thr Ala Gly Val Pro Cys 290 295 300 Gln Arg Trp Asp Ala Gln Ile Pro His Gln His Arg Phe Thr Pro Glu 305 310 315 320 Lys Tyr Ala Cys Lys Asp Leu Arg Glu Asn Phe Cys Arg Asn Pro Asp 325 330 335 Gly Ser Glu Ala Pro Trp Cys Phe Thr Leu Arg Pro Gly Met Arg Ala 340 345 350 Ala Phe Cys Tyr Gln Ile Arg Arg Cys Thr Asp Asp Val Arg Pro Gln 355 360 365 Asp Cys Tyr His Gly Ala Gly Glu Gln Tyr Arg Gly Thr Val Ser Lys 370 375 380 Thr Arg Lys Gly Val Gln Cys Gln Arg Trp Ser Ala Glu Thr Pro His 385 390 395 400 Lys Pro Gln Phe Thr Phe Thr Ser Glu Pro His Ala Gln Leu Glu Glu 405 410 415 Asn Phe Cys Arg Asn Pro Asp Gly Asp Ser His Gly Pro Trp Cys Tyr 420 425 430 Thr Met Asp Pro Arg Thr Pro Phe Asp Tyr Cys Ala Leu Arg Arg Cys 435 440 445 Ala Asp Asp Gln Pro Pro Ser Ile Leu Asp Pro Pro Asp Gln Val Gln 450 455 460 Phe Glu Lys Cys Gly Lys Arg Val Asp Arg Leu Asp Gln Arg Arg Ser 465 470 475 480 Lys Leu Arg Val Val Gly Gly His Pro Gly Asn Ser Pro Trp Thr Val 485 490 495 Ser Leu Arg Asn Arg Gln Gly Gln His Phe Cys Gly Gly Ser Leu Val 500 505 510 Lys Glu Gln Trp Ile Leu Thr Ala Arg Gln Cys Phe Ser Ser Cys His 515 520 525 Met Pro Leu Thr Gly Tyr Glu Val Trp Leu Gly Thr Leu Phe Gln Asn 530 535 540 Pro Gln His Gly Glu Pro Ser Leu Gln Arg Val Pro Val Ala Lys Met 545 550 555 560 Val Cys Gly Pro Ser Gly Ser Gln Leu Val Leu Leu Lys Leu Glu Arg 565 570 575 Ser Val Thr Leu Asn Gln Arg Val Ala Leu Ile Cys Leu Pro Pro Glu 580 585 590 Trp Tyr Val Val Pro Pro Gly Thr Lys Cys Glu Ile Ala Gly Trp Gly 595 600 605 Glu Thr Lys Gly Thr Gly Asn Asp Thr Val Leu Asn Val Ala Phe Leu 610 615 620 Asn Val Ile Ser Asn Gln Glu Cys Asn Ile Lys His Arg Gly Arg Val 625 630 635 640 Arg Glu Ser Glu Met Cys Thr Glu Gly Leu Leu Ala Pro Val Gly Ala 645 650 655 Cys Glu Gly Asp Tyr Gly Gly Pro Leu Ala Cys Phe Thr His Asn Cys 660 665 670 Trp Val Leu Glu Gly Ile Ile Ile Pro Asn Arg Val Cys Ala Arg Ser 675 680 685 Arg Trp Pro Ala Val Phe Thr Arg Val Ser Val Phe Val Asp Trp Ile 690 695 700 His Lys Val Met Arg Leu Gly 705 710 21 1709 DNA Artificial Sequence Metron F-1 21 gaattccacc atggggtggc tcccactcct gctgcttctg actcaatgct taggggtccc 60 tgggcagcgc tcgccattga atgacttcca agtgctccgg ggcacagagc tacagcacct 120 gctacatgcg gtggtgcccg ggccttggca ggaggatgtg gcagatgctg aagagtgtgc 180 tggtcgctgt gggcccttaa tggactgccg ggccttccac tacaacgtga gcagccatgg 240 ttgccaactg ctgccatgga ctcaacactc gccccacacg aggctgcggc gttctgggcg 300 ctgtgacctc ttccagaaga aagactacgt acggacctgc atcatgaaca atggggttgg 360 gtaccggggc accatggcca cgaccgtggg tggcctgccc tgccaggctt ggagccacaa 420 gttcccgaat gatcacaagt acacgcccac tctccggaat ggcctggaag agaacttctg 480 ccgtaaccct gatggcgacc ccggaggtcc ttggtgctac acaacagacc ctgctgtgcg 540 cttccagagc tgcggcatca aatcctgccg ggaggccgcg tgtgtctggt gcaatggcga 600 ggaataccgc ggcgcggtag accgcacgga gtcagggcgc gagtgccagc gctgggatct 660 tcagcacccg caccagcacc ccttcgagcc gggcaagttc ctcgaccaag gtctggacga 720 caactattgc cggaatcctg acggctccga gcggccatgg tgctacacta cggatccgca 780 gatcgagcga gagttctgtg acctcccccg ctgcgggtcc gaggcacagc cccgcctcga 840 gggcggtggc ggttctggtg gcggtggctc cggcggtggc ggttctctag agggacaaag 900 gaaaagaaga aatacaattc atgaattcaa aaaatcagca aagactaccc taatcaaaat 960 agatccagca ctgaagataa aaaccaaaaa agtgaatact gcagaccaat gtgctaatag 1020 atgtactagg aataaaggac ttccattcac ttgcaaggct tttgtttttg ataaagcaag 1080 aaaacaatgc ctctggttcc ccttcaatag catgtcaagt ggagtgaaaa aagaatttgg 1140 ccatgaattt gacctctatg aaaacaaaga ctacattaga aactgcatca ttggtaaagg 1200 acgcagctac aagggaacag tatctatcac taagagtggc atcaaatgtc agccctggag 1260 ttccatgata ccacacgaac acagctatcg gggtaaagac ctacaggaaa actactgtcg 1320 aaatcctcga ggggaagaag ggggaccctg gtgtttcaca agcaatccag aggtacgcta 1380 cgaagtctgt gacattcctc agtgttcaga agttgaatgc atgacctgca atggggagag 1440 ttatcgaggt ctcatggatc atacagaatc aggcaagatt tgtcagcgct gggatcatca 1500 gacaccacac cggcacaaat tcttgcctga aagatatccc gacaagggct ttgatgataa 1560 ttattgccgc aatcccgatg gccagccgag gccatggtgc tatactcttg accctcacac 1620 ccgctgggag tactgtgcaa ttaaaacatg cgctgacaaa gctgacgacg acgacaaaca 1680 ccaccaccac caccaccact agggtcgac 1709 22 1759 DNA Artificial Sequence Magic F-1 22 ggatccgcca gcccgtccag cagcaccatg tgggtgacca aactcctgcc agccctgctg 60 ctgcagcatg tcctcctgca tctcctcctg ctccccatcg ccatccccta tgcagaggga 120 caaaggaaaa gaagaaatac aattcatgaa ttcaaaaaat cagcaaagac taccctaatc 180 aaaatagatc cagcactgaa gataaaaacc aaaaaagtga atactgcaga ccaatgtgct 240 aatagatgta ctaggaataa aggacttcca ttcacttgca aggcttttgt ttttgataaa 300 gcaagaaaac aatgcctctg gttccccttc aatagcatgt caagtggagt gaaaaaagaa 360 tttggccatg aatttgacct ctatgaaaac aaagactaca ttagaaactg catcattggt 420 aaaggacgca gctacaaggg aacagtatct atcactaaga gtggcatcaa atgtcagccc 480 tggagttcca tgataccaca cgaacacagc tatcggggta aagacctaca ggaaaactac 540 tgtcgaaatc ctcgagggga agaaggggga ccctggtgtt tcacaagcaa tccagaggta 600 cgctacgaag tctgtgacat tcctcagtgt tcagaagttg aatgcatgac ctgcaatggg 660 gagagttatc gaggtctcat ggatcataca gaatcaggca agatttgtca gcgctgggat 720 catcagacac cacaccggca caaattcttg cctgaaagat atcccgacaa gggctttgat 780 gataattatt gccgcaatcc cgatggccag ccgaggccat ggtgctatac tcttgaccct 840 cacacccgct gggagtactg tgcaattaaa acatgcgctg acaaagcttc gggcggtggc 900 ggttctggtg gcggtggctc cggcggtggc ggttctctag agggacaaag gaaaagaaga 960 aatacaattc atgaattcaa aaaatcagca aagactaccc taatcaaaat agatccagca 1020 ctgaagataa aaaccaaaaa agtgaatact gcagaccaat gtgctaatag atgtactagg 1080 aataaaggac ttccattcac ttgcaaggct tttgtttttg ataaagcaag aaaacaatgc 1140 ctctggttcc ccttcaatag catgtcaagt ggagtgaaaa aagaatttgg ccatgaattt 1200 gacctctatg aaaacaaaga ctacattaga aactgcatca ttggtaaagg acgcagctac 1260 aagggaacag tatctatcac taagagtggc atcaaatgtc agccctggag ttccatgata 1320 ccacacgaac acagctatcg gggtaaagac ctacaggaaa actactgtcg aaatcctcga 1380 ggggaagaag ggggaccctg gtgtttcaca agcaatccag aggtacgcta cgaagtctgt 1440 gacattcctc agtgttcaga agttgaatgc atgacctgca atggggagag ttatcgaggt 1500 ctcatggatc atacagaatc aggcaagatt tgtcagcgct gggatcatca gacaccacac 1560 cggcacaaat tcttgcctga aagatatccc gacaagggct ttgatgataa ttattgccgc 1620 aatcccgatg gccagccgag gccatggtgc tatactcttg accctcacac ccgctgggag 1680 tactgtgcaa ttaaaacatg cgctgacaaa gctgacgacg acgacaaaca ccaccaccac 1740 caccaccact agggtcgac 1759 

What is claimed is:
 1. A recombinant protein comprising two super domains, separated by a spacer sequence (linker), obtained by combining the HL and K1-K4 domains of HGF and/or MSP α chains, according to general formula (I): [A]−B−[C]−(D)_(y)  (I) in which [A] corresponds to the sequence (LS)_(m)-HL-K1-(K2)_(n) wherein: LS comprises amino acid residues 1-18 of MSP (SEQ ID NO:20); HL comprises an amino acid sequence starting between residues 32-70 of the HGF α chain (SEQ ID NO:18) and ending between residues 96-127 of the identical chain or an amino acid sequence starting between residues 19-56 of the MSP α chain (SEQ ID NO:20) and ending between residues 78-109 of the identical chain; K1 comprises an amino acid sequence starting between residues 97-128 of the HGF α chain (SEQ ID NO:18) and ending between residues 201-205 of the identical chain or an amino acid sequence starting between residues 79-110 of the MSP α chain (SEQ ID NO:20) and ending between residues 186-190 of the identical chain; K2 comprises an amino acid sequence starting between residues 202-206 of HGF α chain (SEQ ID NO:18) and ending between residues 283-299 of the identical chain or an amino acid sequence starting between residues 187-191 of MSP α chain (SEQ ID NO:20) and ending between residues 268-282 of the identical chain; m and n are 0 or 1; B is the sequence [(X)_(q)Y]_(r), wherein X=Gly and Y=Ser, or Cys, or Met, or Ala; q is an integer from 2 to 8; r is an integer from 1 to 9; [C] corresponds to the sequence HL-K1-(K2)_(s) wherein HL, K1, and K2 are as defined above, s is 0 or 1; D is the sequence W-Z, wherein W is a conventional proteolytic site, Z is any tag sequence useful for the purification and detection of the protein; and y is 0 or
 1. 2. The recombinant protein according to claim 1, wherein: HL comprises amino acids 32 to 127 of the HGF α chain (SEQ ID NO:18), or amino acids 19 to 98 of the MPS α chain (SEQ ID NO:20); K1 comprises amino acids 128 to 203 of the HGF α chain (SEQ ID NO:18), or amino acids 99 to 188 of the MPS α chain (SEQ ID NO:20); and K2 comprises amino acids 204 to 294 of the HGF α chain (SEQ ID NO:18), or amino acids 189 to 274 of the MPS α chain (SEQ ID NO:20).
 3. The recombinant protein according to claim 1 of formula (II): LS_(MSP)-HL_(MSP)-K1_(MSP)-K2_(MSP)-L-HL_(HGF)-K1_(HGF)-K2_(HGF)-D  (II) wherein LS_(MSP) comprises amino acids 1-18 of MSP (SEQ ID NO:20), HL_(MSP) comprises amino acids 19-56 of MSP (SEQ ID NO:20), K1_(MSP) comprises amino acids 99-188 of MSP (SEQ ID NO:20), K2_(MSP) comprises amino acids 189-274 of MSP, HL_(HGF) comprises amino acids 32-127 of HGF, K1_(HGF) comprises amino acids 128-203 of HGF, K2_(HGF) comprises amino acids 204-294 of HGF, L comprises the sequence (Gly₄Ser)₃, D comprises the sequence Asp₄-His₆.
 4. A therapeutic agent comprising the recombinant protein of claim
 1. 5. A pharmaceutical composition comprising an effective amount of the recombinant protein of claim 1 in combination with pharmacologically acceptable excipients. 